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  <front>
    <journal-meta />
    <article-meta>
      <title-group>
        <article-title>An Eco-Cognitive Model of Ignorance Immunization</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <string-name>Lorenzo Magnani (lmagnani@unipv.it)</string-name>
          <email>ni@unich.it</email>
          <xref ref-type="aff" rid="aff0">0</xref>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <aff id="aff0">
          <label>0</label>
          <institution>Department of Humanities, Philosophy Section Computational Philosophy Laboratory, University of Pavia Pavia</institution>
          ,
          <addr-line>27100</addr-line>
          <country country="IT">Italy</country>
        </aff>
        <aff id="aff1">
          <label>1</label>
          <institution>Selene Arfini</institution>
        </aff>
      </contrib-group>
      <pub-date>
        <year>2003</year>
      </pub-date>
      <fpage>312</fpage>
      <lpage>317</lpage>
      <abstract>
        <p>In 2005, Woods described the epistemic bubble as an immunized state of human cognition that compromises the awareness of the agent about her beliefs and knowledge. The idea of an immunized knower swung with the proposal advanced by Gabbay and Woods of constructing a practical logic and epistemology, which can actually define itself as agent-centered, goal-oriented, and resource-bound. In order to carry out this project, in this paper we will introduce a symmetrical view on the agent immunization, focused on the agent's missing awareness of her ignorance, also highlighting the importance of considering the actual agent as cogently ignorant, too. Proposition 3.2c The Error Abundance Thesis: Human beings make errors, lots of them.</p>
      </abstract>
      <kwd-group>
        <kwd>Informal Logic</kwd>
        <kwd>Belief-Revision</kwd>
        <kwd>Bounded Rationality</kwd>
        <kwd>Fallibilism</kwd>
        <kwd>Ignorance</kwd>
        <kwd>Epistemic Autoimmunity</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body>
    <sec id="sec-1">
      <title>-</title>
      <p>
        In 2003 Gabbay and Woods officially proposed a program,
condensed in a series of volumes called “A Practical Logic of
Cognitive Systems”, to the aim of constructing new logical
models able to fill the gap between the logical and cognitive
representation of human agent and its “real” – eco-cognitive
multi-dimensioned – counterpart. The last volume of the
series, published in 2013, was aimed at drawing an empirically
“sensitive” and “aware” form of logic, able to deal with
actual reasoners’ cognitive performances
        <xref ref-type="bibr" rid="ref14">(Woods, 2013)</xref>
        . At the
same time the volume is a collection of the logical and
cognitive studies concerning errors in reasoning and their
productive character.1 In this massive production, even if the
focus has been on the third-way reasoning humans actually
performs, especially the exploitation of errors and downfalls, the
agent is always considered an enough acquainted reasoner, a
knower, in her intents. The principles of her possibilities and
boundaries are determined by general abundance theses that
substantiate a form of fallibilism:
      </p>
      <p>Proposition 3.2b The Cognitive Abundance Thesis:
Human beings have knowledge, lots of it.</p>
      <p>
        Proposition 3.2d The Enough Already Thesis. Human
beings are right enough about enough of the right things
enough of the time to survive and prosper
        <xref ref-type="bibr" rid="ref14">(Woods, 2013,
pp. 86–88)</xref>
        .
      </p>
      <p>
        In this perspective the presentation of the “right enough
human being” is referred to the study of the cognitive
endowments of an “actual” agent, mostly focusing on her
knowledge and cognitive skills. The “ignorant” part is basically
described as an innocent tendency to commit errors (even if
lots of them) or treated in the light of fallacious reasoning.
We contend, following Proctor, that “ignorance is more than
a void”
        <xref ref-type="bibr" rid="ref11">(Proctor, 2005, p. 2)</xref>
        , it is an influential part of
human cognition, and affects not only our deficiencies but also
the ways we adopt to fill them with beliefs and knowledge.2
Thus, aiming at furnishing a new contribution to the
ambitious project of the naturalization of logic, we will introduce
an explanation of the role played by the ignorant part of the
“real agent”. First of all, by analyzing the state that most
indicates the presence of ignorance in the perspective of the agent
herself, that is “the state of doubt” and, second, by showing
how this state affects the Fallibilist principles (which are the
base of the Abundance and the Enough Already Thesis)
proposed by Woods.
Despite the topic of “doubt” undeniably holds a rich past in
the history of philosophy, the interest around it in the last
century has progressively decreased mainly because of the focus
of analytical philosophy on the definitions of knowledge and
truth. Many authors became more interested in specifying
the visible boundaries that characterize certainty than in
directly examining the nucleus of what is beyond it. Attention
has been devoted to intertwine doubt with specific arguments
such as ambiguity, vagueness, and credibility.
      </p>
      <p>
        On the contrary, the philosophical background that
informs the Naturalization of Logic resorts to Peircean
tradition: Peirce directly examined the problem of doubt and
tried to grasp its philosophical, epistemological, and
cogni2Certainly fallacies and heuristics have always been considered
the main door to step into the problem of “ignorance”, see, for
instance the classical
        <xref ref-type="bibr" rid="ref12 ref15 ref6">(Hamblin, 1970; Walton, 1995; Woods, Irvine, &amp;
Walton, 2004)</xref>
        or the analysis of the so-called ignorance-preserving
traits of abduction (Cf.
        <xref ref-type="bibr" rid="ref1">(Aliseda, 2005)</xref>
        ,
        <xref ref-type="bibr" rid="ref8">(Magnani, 2013)</xref>
        and
        <xref ref-type="bibr" rid="ref13 ref3">(Gabbay &amp; Woods, 2005)</xref>
        )
tive essence. Indeed, in Peirce’s pragmatist theory, the
specific difference between doubt and belief is practical. He
pictured the transition between the state of doubt to belief
in terms of action and reaction of the agent who feels them.
The relationship of the mental state of doubt with the active
start of questioning and of the state of belief with the relief of
the discovery of an answer is fundamental. It allows to clarify
the profound connection between the epistemic conditions of
the agent and her cognitive reaction to them. In accordance
to this view, the main incentive that drives the agent to find
a solution of the problems that torment her is the cognitive
and psychological state related to the doubt itself: in
particular, the known difference between the feelings that doubt
and belief provoke. In a famous article, Peirce described the
states of doubt and belief as antithetical
        <xref ref-type="bibr" rid="ref10 ref9">(Peirce, 1998b)</xref>
        ,
precisely in consideration of this aspect. Belief is considered the
quiet state of affirming a principle (a proposition, an idea)
and doubt an irritating condition, which not only deprives the
agent of her certainties but, through that loss, compromises
her quiet.
      </p>
    </sec>
    <sec id="sec-2">
      <title>Thus, both doubt and belief have positive effects upon</title>
      <p>
        us, though very different ones. Belief does not make us
act at once, but puts us into such a condition that we shall
behave in some certain way, when the occasion arises.
Doubt has not the least such active effect, but stimulates
us to inquiry until it is destroyed
        <xref ref-type="bibr" rid="ref10 ref9">(Peirce, 1998a, p. 114)</xref>
        .
      </p>
      <p>
        What Peirce defines as the irritation of doubt is an
unwanted state of mind caused by the loss of certainty in the
agent knowledge. We can consider this description as the
easier way to see the experience of a part of ignorance. The
individual desperately wants to escape from the condition of
doubt
        <xref ref-type="bibr" rid="ref10 ref9">(Peirce, 1998a)</xref>
        because, if belief is (at least) the
confidence about having a reliable knowledge in order to act, the
state of doubt implies the possibility of a blind spot in that
knowledge, a missing direction to move toward. Ignorance,
in the most visible and concrete form, appears to be just the
formulation of specific doubts. In summary, our introduction
to the problem of ignorance in the Naturalization of Logic
clearly relates to the definition of doubt provided by Peirce,
which appears to play the conceptual role of a perfect medium
term between ignorance and knowledge. For this reason, we
can take advantage of this Peircean definition to insert a
complementary proposition into the Fallibilist principles we
mentioned above.
      </p>
      <sec id="sec-2-1">
        <title>Fallibilism: A Belief-Based Paradigm</title>
        <p>
          In order to comprehend how Peirce’s epistemology grounds
the Naturalization of Logic we should leave for a moment the
analysis of doubt and briefly revisit the definition of belief.
Peirce describes the state of belief as having just three
properties: “first, it is something that we are aware of; second, it
appeases the irritation of doubt; and, third, it involves the
establishment in our nature of a rule of action, or, say for short
a habit”
          <xref ref-type="bibr" rid="ref10 ref9">(Peirce, 1998a, 5.397)</xref>
          .3 Thanks to this scheme
rejoin and further deepen the main tenets of Woods’ fallibilism
indicated in the previous subsection.
        </p>
        <p>The awareness of our belief state (that is, according to both
Peirce and Woods, the only state that allows us “to know”)
obviously is what makes us able to define ourselves
“knowers”. In this perspective, the tendency to knowledge indicated
by Woods in the proposition 3.2b is just a consequence of the
awareness of how much we believe we know and how much
we are able to learn. The second feature, the capacity of
belief to appease “the irritation of doubt” is at the basis of the
“Error Abundance” thesis, which composes the second item
of Woods’ fallibilism. Believing is a pleasurable state, a state
that calms the agent and gives her the cognitive resources to
act. It is this practical advantage that makes it preferable to
doubt, no matter if it is epistemically more convenient or less.
The tendency to commit errors (and so of believing in an
incorrect, or “fast and frugal”, statement instead of doubting
it)4 of the actual agent is exactly derived from this
unfortunate preference. Finally, the third condition of belief, which
“involves the establishment in our nature of a rule of action,
or, say for short a habit”, can be seen as the feature that seals
the “Enough Already Thesis”. Even intuitively, believing to
know something has two main consequences: a) it repels the
irritation of doubt, making us sure about our own knowledge
(sometimes compromising our ability to individuate errors in
it) and, b) since belief gives us the possibility to act in the
world upon a certain circumstance, we will be inclined to
rely on the same belief as a principle for solving other similar
circumstances. The “enough already thesis” does not affirm
much more than the prevalence of the occurrence for our
belief to be confirmed by a personal (more or less fortunate)
experience.</p>
        <p>The parallel between Woods’ Fallibilist principles and the
Peircean definition of belief allows us, first of all, to
confirm the knowledge-based perspective of Woods’ analysis
itself. The actual agent is a knower, because she is also a
believer. The fact she believes she knows implies the
possibility of committing errors, but it does not compromise her
epistemic status of knower. We contend, extending Woods’
characterization of the actual agent, that ignorance is more
than a simple tendency to commit errors: taking advantage of
the description of belief in Peirce’s work we can put down the
equivalent three properties for doubt considering it as visible
ignorance. Like belief, doubt is a state we are well aware of ;
it is an unwanted and irritating state for the agent; it requires
3For clarity, we should mention that the neat difference between
doubt and belief, in Peircean perspective, is grounded on and limited
by the sensations and the practical awareness of the agent. It is not
in question whether we can have unconscious beliefs or doubts but,
according to Peirce, how and why the ones we perceive as affecting
our behavior are epistemologically relevant.</p>
        <p>
          4Here, thanks to Gigerenzer’s formula,
          <xref ref-type="bibr" rid="ref4">(Gigerenzer &amp; Goldstein,
1996)</xref>
          , we are in general referring to the cognitive virtues of
heuristic reasoning and fallacies, analyzed by informal logic,
psychology, and cognitive science in the past forty years, cf., for
example,
          <xref ref-type="bibr" rid="ref14 ref5 ref7">(Gigerenzer, Todd, &amp; the ABC Research Group., 1999; Woods,
2013; Ippoliti, 2015)</xref>
          .
an inferential reasoning (and the fixation of another belief) in
order to end. Two conclusions follow, one more evident than
the other.
        </p>
        <p>
          The most evident outcome is a definition of ignorance that
is already formulated in Woods’ theory. He defines
ignorance as “inferentially productive”, as a part of our cognition
that we can examine through fallacious but effective
inferential processes
          <xref ref-type="bibr" rid="ref14">(Woods, 2013, p. 335)</xref>
          . In this perspective
we can rethink the principles of knowledge and error
abundance adding a “doubt openness condition”. The possibility
of doubt and of recognizing and admitting ignorance opens
the possibility of an improvement of the agent knowledge
and so it enforces the tendency to gain new data (Knowledge
Abundance). At the same time, as already said, doubt also
implies a cognitive irritation that forces the agent to quickly
arrive to a resolution of the problem at stake. This urgency can
affect the inference, performed in order to solve the problem,
making easy for the agent to commit errors (Errors
Abundance).
        </p>
        <p>The second and less evident consequence of introducing
the doubt as “the visible part of our ignorance” in the
fallibilist triad, is instead a sort of “negative” affirmation.
Examining the epistemic status of ignorance at the conscious
level, so addressing knowledge firstly as belief, and speaking
of doubt as something that we do not recognize as
belonging to our knowledge, we let the door open to the fact that
an actual agent is not “simply” ignorant of what she is aware
she doesn’t know. Ignorance is not completely equivalent to
doubt, it is not just a missing piece of our cognition,
something that the agent knows she does not know. Doubt can be
perceived as the frame of our ignorance, but it is the simple
consequence of our fallible cognition. Of course the project
toward the Naturalization of Logic has already proposed to
extend the field in which knowledge can be investigated,
contending the importance of the examination of the errors of
reasoning and their “positive” aspects. Something more can
be said: since ignorance corresponds to something that goes,
at least partially, beyond the cognitive sight of the agent, we
should investigate it as the Naturalization of Logic aims at
explaining the limit of our knowledge: far beyond the
selfperspective of the actual agent.</p>
        <p>
          The “negative” affirmation permits us to have an “Enough
Already Thesis”, less indulgent with respect to the agent’s
actual status. As we have already said, the psychological and
emotional component of doubt makes its experience
repulsive for the agent. So, if even the visible part of ignorance is
hard to be managed by the agent, the part of ignorance that
falls beyond her control (or her will) must be extremely
difficult to reach. The “Enough Already Thesis” displays the
capacity of human beings to be right enough about enough
of the right things enough of the time to survive and prosper
          <xref ref-type="bibr" rid="ref14">(Woods, 2013, pp. 86–88)</xref>
          . Now we should add: “despite”
how much the agent ignores, how much she does not want
to admit she ignores and the repulsion for being in a state of
doubt the agent appears to be not just “able enough” to
survive and prosper, but also to bear the weight of her ignorance
without feeling it.
        </p>
        <p>
          Hence, instead of focusing on the confidence in the
“Enough Already Thesis” (that we can condense in “we are
able to survive, after all”), all the added caveats demand a
deeper questioning on the tendency of human beings to avoid
a complete awareness of their own ignorance. It is not
unreasonable asking how and why this is functional, for instance.
The examination of these important issues is already
displayed in what Woods called the Epistemic Bubble
          <xref ref-type="bibr" rid="ref13 ref3">(Woods,
2005)</xref>
          . We can picture the Epistemic Bubble as a form of
knowledge-based immunization that inhibits the agent from
distinguishing her knowledge and her beliefs. In the next
section, we will investigate the “Bubble Thesis”: this will allow
us to comprehend that the agent bears also a ignorance-based
immunization, which compromises her ability to frame her
own ignorance and distinguish it from what she just doubts
about.
        </p>
      </sec>
      <sec id="sec-2-2">
        <title>The Bubble Thesis and the Double-Sided</title>
      </sec>
      <sec id="sec-2-3">
        <title>Autoimmunity System</title>
        <p>The idea of the Epistemic Bubble originates from the analysis
of both purpose and ending of the state of doubt, albeit it
remains focused on the analysis of the state of belief. It is based
on the assumption that the state of belief is not just pleasant,
but also fallible and uncertain. In its essence, Woods’ Bubble
Thesis focuses on the relation between the complex of
beliefs an agent has and her awareness as regard as either their
correctness or unsteadiness. This suggests that the agent’s
mechanism of belief formation can provide an easy way out
to the Peircean irritation of doubt through a systematic
ascription of knowledge concerning a mere belief, immunizing
the agent from being able to spot the difference (so letting
the agent think she knows something when she merely
believes she does). In order to utterly understand the
potentialities of this idea, we have to introduce two dichotomies that
Woods indicates as substantial. The first between what we
could consider a broad definition of knowledge related to the
Peircean state of belief. The second concerning the important
distinction between the first and third-person perspective of
the agent.</p>
        <p>
          As already mentioned, belief in Woods’ theory
corresponds to the Peircean definition: it is the sole state that solves
the irritation of doubt and brings peace to the cognitive
unsteadiness of the agent; fundamentally, it is a state that calms
the agent’s mind. Knowledge, instead, is defined as a “kind of
case-making. One knows that P only if one has one’s disposal
a case of requisite strength to make for P”
          <xref ref-type="bibr" rid="ref13 ref3">(Woods, 2005, p.
735)</xref>
          . The distinction between belief and knowledge,
however, is not evident for the agent who knows and believes.
Indeed, the achievement of knowledge always entails a state
of belief in the agent, even if the attainment of a belief does
not directly imply the gain of knowledge.
        </p>
        <p>The entanglement between knowledge and belief drives
our argumentation to the difference between the first and the
third-person perspective. Indeed, for the agent is kind of
easy to say if someone else knows or thinks she knows
something. That is to say, from the third-person perspective one
can tell the difference between a belief that stands for an
actual knowledge attainment and a belief that just brings about
some cognitive relief to an irritating state of doubt. The agent
can judge if someone else’s is either effective knowledge or
mere confidence. From the first-person perspective, the
difference is instead blurred, due to the fact a belief state entails
the occurrence of knowledge. This is an entanglement indeed
recognized as the focus for the asymmetry between first and
third-person perspective. Whenever the agent knows
something, she is compelled to believe she knows it. But, since
the attainment of knowledge is different from the
establishment of a belief, she can believe she knows something even
when she does not. This distinction between knowledge and
its mere ascription is visible only in a third-person
perspective.</p>
        <p>Hence, while in the first-person perspective a reliable
belief is always claimed as knowledge, in the third-person
perspective the proposition can be judged as potentially verified
or erroneous. Thus, in the case of the first-person perspective
there is not a clear distinction between knowing and believing
in something, even if it is pretty clear in the case of the agent’s
third-person perspective. At the same time, in the case of the
first-person perspective the state of belief represents not only
the way the agent can experience some relief from the
irritation of doubt, but also the unique possibility for the agent of
attaining any sort of knowledge. This idea is better expressed
in Woods terms in the Proposition 6:
(The Downside of Belief). Belief is both a condition of
knowledge and an impediment to its attainment.</p>
      </sec>
    </sec>
    <sec id="sec-3">
      <title>In so saying, we can see that the traditional approach to knowledge is defective. It rightly insists on the indispensability of belief for knowledge, but it ignores, or downplays, its impedimental role (Woods, 2005, p. 739).</title>
      <p>
        So, albeit the fact that there is a solid difference between
the epistemological status of belief and knowledge, the agent
cannot be aware of this distinction when she has to deal with
her own cognition. Hence, in its essence, the epistemic
bubble is configured as a first-person knowledge-ascription,
performed by the knowing agent, to whom the difference
between knowing something and thinking she knows that same
thing is unapparent – and the tension that may arise is always
solved in favor of the former
        <xref ref-type="bibr" rid="ref13 ref3">(Woods, 2005)</xref>
        . This mechanism
always provides – more or less heavily – an illusion about the
truthfulness of the knowledge of the agent’s first-person
perspective.
      </p>
      <p>Woods describes the epistemic bubble as an autoimmune
mechanism of the agent. The naiveness of the agent about
her own cognition is directed by the same system that at the
same time permits her to attain any type of knowledge.
Belief, as a cognitive structure, is in primis a tool that gives her
the possibility of taking action into the world. If the agent
could not be sure about what she thinks she knows, she could
not take any decision and she would be constantly in a state
of doubt and struggle. The autoimmune mechanism helps her
out from the freezing state of doubt but does not provide a
safe exit from it.</p>
      <p>As we can see, the epistemic bubble as an autoimmune
mechanism concerns the limits of the attainment of
knowledge, its entanglement with the state of belief, and the
unapparent distinction between the two in the first-person
perspective. As we have said in the case of the original Fallibilist
principles mentioned in the previous section, the idea of
epistemic bubble is profoundly connected with the definition of
belief offered by Peirce. Using a similar connection, in order
to shift the focus on the limits of ignorance-recognition, we
must reconsider Peirce’s doubt in the light of the autoimmune
mechanism described above.</p>
      <sec id="sec-3-1">
        <title>Doubt and the Missing-Ascription of Ignorance</title>
        <p>Given the fact belief and knowledge are connected in the
firstperson perspective, but way far from each other in the
thirdperson view, we can formulate the same consideration in the
case of doubt and ignorance. The “negative” affirmation in
the Fallibilist principles is oriented to highlight the
distinction between doubt and ignorance, but this separation is
manifest only in a third-person perspective. In the third-person
perspective, doubt presents the character of being a state of
irritation for the subject, a push for inferential reasoning, and,
mainly, a state she is aware of : it is a frame of the ignorance
of the subject in those limits. The proper ignorance of the
agent is beyond the frame of her doubts. It is something the
agent cannot consider in first-person perspective. At the same
time, the only “visible part of ignorance” for the first-person
perspective can entirely frame the ignorance of the agent.</p>
        <p>This relation is clear when we think about the possibility
of describing how we ignore something. The only method
that we can apply is to frame our ignorance, speaking about
the propositions we doubt to be true, the situations we are
not certain about, and the collection of data we are not sure
if they are reliable or not. But these data are just what we
consider part of our ignorance. They cannot be even close
to the propositions we are not informed of, the situations out
of our sight, and the collection of data we are not aware of.
These data are part of our ignorance, but we cannot reach
them through our doubts. At the same time, doubt is the only
cognitive tool that permits us to grasp pieces of ignorance and
let us admit that there is something out of our reach.</p>
        <p>So, exactly as in the epistemic bubble, albeit the fact that
there is a solid difference between the epistemological
statuses of doubt and ignorance, the agent cannot be aware of
this distinction when she has to deal with her own cognition.
Consequently, we can describe the ignorance-based bubble as
a missing-ascription of ignorance, performed by the agent, to
whom the difference between ignoring something and
doubting is unapparent.</p>
        <p>This structure is also an autoimmune mechanism of the
agent. Doubt, the only tool that permits the agent to
investigate a part of her ignorance, makes also impossible for the
agent to distinguish the amount of actual ignorance she
possesses from what she is just able to recognize. At the same
time, without this autoimmune system we would never leave
the state of doubt. The ignorance-based autoimmune
mechanism illustrates the ignorance about one’s own ignorance as
the only possible condition for the attainment of any kind of
knowledge in more or less uneasy condition. The
immunization to ignorance is an indefeasible mechanism of human
cognition as well it is the epistemic bubble. They simply define
the borders of possibility for first-person perspective agents
to modify their own epistemological status.</p>
        <p>By considering the cognitive state of doubt, we can extend
our analysis also considering Woods’ thesis about truth. As
we will better illustrate, the analysis of the epistemic bubble
leads to the affirmation that the truth, for the first-person
perspective, is a fugitive property. In brief, the difficulty for the
agent to distinguish the difference between what she knows
and what she believes, impairs her possibility to reach and
recognize truth. Using the same association in the case of
the analysis of the agent’s immunity to her own ignorance we
can arrive to a similar consideration regarding her capacity to
reach and recognize the entireness of ignorance beyond the
frame of her doubts.</p>
        <sec id="sec-3-1-1">
          <title>The Fugitivity of Truth (and Ignorance)</title>
          <p>
            The autoimmune system of the epistemic bubble makes the
attainment of truth a relatively impossible task from the
firstperson perspective, adding a veil of skepticism to the
cognitive analysis. This is clearly stated in Proposition 15, stating
the Fugitivity of Truth: “Within epistemic bubbles, truth is
a fugitive property. That is, one can never attain it without
thinking that one has done so; but thinking that one has
attained it is not attaining it”
            <xref ref-type="bibr" rid="ref13 ref3">(Woods, 2005, p. 745)</xref>
            . At this
point it is interesting to note we can apply a similar argument
when considering ignorance. The missing-ignorance
ascription in the first-person perspective makes the idea of
ignorance a “fugitive property” because every time the agent tries
to define what she ignores, she is reaching just the limits of
her doubts. Hence, we can describe the mechanism of
epistemic embubblement taking advantage of a two-sided
definition: a) the impossibility – from the first-person perspective
– of a clear distinction between knowledge and belief and
b) the certainty of the agent to have a fully achieved
knowledge about something even without the actual attainment of
it; we can find a similar two-sided definition in the case of
the ignorance-based bubble: a) the impossibility – for the
first-person perspective – of a clear distinction between doubt
and ignorance and b) the certainty of the agent to have fully
framed her ignorance trough her doubt, even if she cannot do
it.
          </p>
          <p>As we have already mentioned, the ignorance that the
agent can perceive is just defined through her doubts, and her
doubts can picture just a small portion of her ignorance. The
disparity between the two parts of her ignorance can be
illustrated using the Freudian metaphor of the iceberg: the
portion apparent to the subject is just a small piece with respect
to the whole structure. For this reason the missing-ascription
of ignorance plays a role analogous to that of the epistemic
bubble in the mechanism of creation and revision of beliefs.
It assures a cognitive status of certainty about the agent
ignorance that permits the agent to be confident in her choices
and knowledge. The agent, not being able to see how much
she ignores, considers the attainment of answers concerning
her doubts a concrete way to remove her ignorance piece by
piece.</p>
          <p>The role of confidence is part of the autoimmune
mechanism as much as the proper ignorance embubblement. The
embubblement allows the agent to consider what is part of
her doubts as the entire amount of her ignorance and her
purpose will be to remove it as much as possible. In this sense,
the role of the missing-ascription of ignorance is fully
motivational. But the more effective consequence in the agent’s
cognition is the self-representation that the agent constructs
in first-person perspective: indeed, there is a tendency to
consider the knowing or ignorant self as a controllable part. The
agent is fully aware of both the state of belief and of doubt,
which are the only vehicles for her attainment of
propositional/sentential knowledge and her partial awareness of
ignorance. In the following subsection we will show that these
partial recognitions drive the agent to formulate a sort of
Homunculus Fallacy, when she tries to depict her
epistemological state.</p>
        </sec>
      </sec>
      <sec id="sec-3-2">
        <title>Cognitive Autoimmunity: The Homunculus Fallacy</title>
        <p>In the case of the first-person perspective we have illustrated
above the epistemic bubble provides two main illusions. The
first illusion is strictly related to the epistemic dimension of
the bubble: it provides the belief-based ascription of
knowledge even when that knowledge is not entirely attained. The
second illusion is related to the cognitive and emotional
outcome of the bubble: it makes the agent convinced of being
aware of the knowledge she possesses, even when she should
not.</p>
        <p>The same deceptive double effect also emerges from the
missing-ascription of ignorance. On the one hand, it provides
the agent the conviction that she is ignoring just a specific
sort of data, categorizable in the framework of her first-person
perspective. On the other hand it gives the agent the illusion
of being able to have a clear view of her own ignorance. In
both cases the agent is naively assured about her cognition.
She thinks herself able to see her knowledge and her
ignorance as they were, respectively, sets of attained or missing
propositions. The agent is deluded into being, absurdly, in
an indifferent position about her own ignorance/knowledge
structure. This effect can be pictured as a sort of Homunculus
Fallacy. The subject thinks herself almost as a double being:
one part of her knows and ignores and another part can spot
how much she knows and how much she ignores.</p>
        <p>
          The fairly hidden Homunculus Fallacy is clear: the
autoimmune mechanism suggests that the agent can judge about the
attainment of knowledge or the perception of ignorance, as
if the judgment belonged to a distinct part, which directly
knows or ignores. This illusory distinction allows us to also
consider the property of just apparent corrigibility of the
bubbles: “Since each of us is in his own epistemic bubble, the
distinction between merely apparent correction and genuinely
successful correction exceeds the agent’s command. [. . . ]
Within an epistemic bubble the distinction between
beliefchange and belief-correction is also “resolved” in favor of
the latter”
          <xref ref-type="bibr" rid="ref13 ref3">(Woods, 2005, p. 741)</xref>
          . When the agent realizes
that the belief she had was incorrect, or the knowledge she
thought she had was illusory, the change of mind does not
break the mechanism of the bubbles. Since she has to replace
an information with another one and the only way to do it
is to believe she gain a correct one, she simply shift from a
bubble to another, maintaining the autoimmune mechanism
unbroken. The bubble was not corrected, it just changed. The
homunculus fallacy helps this dynamic because, for the agent,
the change of mind is seen as a correction of a wrong
statement (a mere belief) with a truthful one (knowledge) as she
was able to spot the difference from the first-person
perspective. We can see, from a third-person perspective, that the
transition is from a belief to another one but this perception is
unaffordable by the self-assured agent.
        </p>
        <p>As it can be imagined, a similar structure is present in the
account of ignorance-based bubbles: the “end” of a
missingascription of ignorance happens when the obtained answer
to a given doubt is just apparent. The missing-ascription of
ignorance shifts to another problem, which arises in the
presence of new collected information. While for the epistemic
bubble there is a distinction between belief-change and
beliefcorrection, which is resolved in favor of the latter, in the case
of the ignorance-based bubble there is a distinction between
change of doubt and ignorance-removal that is resolved in
favor of the second. In conclusion, the autoimmune system
provides the agent with an efficient and improvable mechanism
of belief and doubt change without the loss of confidence in
self-awareness.</p>
        <sec id="sec-3-2-1">
          <title>Conclusion</title>
          <p>
            The introduction of the problem of ignorance in the
framework of a naturalization of logic involves problematic issues
regarding the epistemological status of the “real agent”. First
of all we have added to Woods’ Fallibilist principles what
we have called the negative affirmation: this move rendered
possible the examination of the naiveness of the individual
agent about her own cognition, shifting the attention to the
state of doubt (defined by Peircean dynamic) instead of belief.
Thanks to this change of perspective, a new subtle
reinterpretation of Woods’ “epistemic bubble” has favored the
elicitation of that autoimmune mechanism that affects not only the
system of belief creation and revision of a human agent –
considered not able to distinguish what she knows and what
she only thinks she knows – but also the relationship between
doubt and ignorance-recognition. As belief is “the condition
of knowledge and the impediment of its attainment”
            <xref ref-type="bibr" rid="ref13 ref3">(Woods,
2005)</xref>
            , doubt is the requirement that permits the emerging of
uncertainness while preventing the integral cognition of the
agent’s ignorance. Hopefully further research concerning the
immunized and ignorant part of human cognition will provide
interesting new insights able to enhance the newborn field of
the naturalization of logic, as much as the study of “errors of
reasoning” has had so far.
          </p>
        </sec>
      </sec>
    </sec>
  </body>
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