A SIGNAL-BASED EPISTEMOLOGY
A unified framework for understanding knowledge, perception, and reality grounded in a single principle:
all access to reality is mediated through detectable signals and constructed through processes of
signal generation, detection, and interpretation
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Abstract
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This paper proposes a unified framework for understanding knowledge, perception, and reality
grounded in a single principle: all access to reality is mediated through detectable signals and
constructed through processes of signal generation, detection, and interpretation. No observer—
biological or artificial—has direct, unmediated access to external truth; instead, all knowledge
arises from processes that involve the generation, detection, and interpretation of physical,
chemical, or informational traces available in the present.
Building on this premise, the paper distinguishes between belief and knowledge, arguing that
confirmation is a necessary condition for knowledge, while also recognizing intrinsic limits to what
can be verified. It develops a signal-based epistemology in which perception, memory, and scientific
inquiry are understood as structured methods of extracting and interpreting signals. Within this
framework, memory is not treated as a literal recording of past events, but as a reconstructive
process grounded in present neural states, and internal mental phenomena—such as intentions,
desires, and emotions—are accessed through signal-mediated processes that involve both
interpretation and active generation, rather than direct observation of fully formed internal
objects.
The analysis further examines constraints imposed by established physics, including limits from
thermodynamics, relativity, and quantum mechanics, alongside computational and logical boundaries.
These constraints reinforce the central claim that not all truths about reality are epistemically
accessible, even if they are ontologically determinate.
The paper also distinguishes between simulation and instantiation, arguing that digital systems can
represent biological processes but do not constitute biological reality themselves, emphasizing the
importance of substrate in discussions of mind, consciousness, and potential "uploading" scenarios.
Across domains—including neuroscience, artificial intelligence, physics, and philosophy—the
framework highlights a consistent structure: detection depends on signals, and understanding depends
on interpretation. This leads to a broader conclusion that the limits of knowledge are not merely
technological but are rooted in the fundamental structure of how systems interact with reality.
The goal of this work is not to provide a complete theory of mind or physics, but to establish a
coherent, cross-domain foundation for understanding the relationship between information,
perception, and reality, and to clarify the boundaries within which knowledge can be meaningfully
claimed.
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1. Introduction
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Human beings routinely operate as if reality is directly accessible: we speak as though we "see what
is there," "remember what happened," and "know what is true." Yet across domains—from perception
and memory to scientific measurement—closer inspection reveals a more constrained structure. What
we call knowledge is not direct contact with reality itself, but the result of interpreting signals,
traces, and representations available to us in the present.
This paper is motivated by a set of recurring questions that arise across philosophy, science, and
everyday reasoning:
• What distinguishes knowledge from mere belief?
• How do we access past events if only present evidence is available?
• Can internal states such as intentions or desires ever be known directly?
• Are there limits to what can be known, even in principle?
• What is the relationship between simulation and reality, especially in the context of digital
systems and artificial intelligence?
Despite their apparent diversity, these questions share a common structure: they concern the
relationship between observers and the information available to them. This paper proposes that they
can be addressed within a unified framework by recognizing a fundamental constraint:
> All knowledge of reality is mediated through detectable signals and constructed through processes
of generation, detection, and interpretation.
Under this view, no system—biological or artificial—has unmediated access to external reality.
Instead, knowledge arises from the detection of physical or informational signals (such as light,
sound, chemical traces, or neural activity) and the interpretation of those signals through
structured processes of inference. This applies equally to perception, memory, scientific
observation, and social understanding.
This framework has several immediate consequences. First, it implies that confirmation is a
necessary condition for knowledge, since knowledge requires some form of signal-based verification.
Second, it entails that access to the past is indirect, limited to present-day traces and encodings
rather than preserved, co-existing records. Third, it establishes that internal mental states—
whether one's own or another's—are not directly observable as fully independent entities, but are
accessed through signal-mediated processes involving both interpretation and active generation.
Finally, it suggests that there are structural limits to knowledge, not merely practical or
technological ones, rooted in what signals can exist and be detected.
The aim of this paper is not to introduce new physical laws or replace existing scientific theories.
Rather, it offers an interpretive framework that integrates insights from epistemology,
neuroscience, physics, and information theory into a coherent account of how knowledge is formed and
what its limits are. In doing so, it clarifies distinctions that are often blurred in informal
reasoning—such as the difference between representation and reality, belief and verification, and
detection and inference.
The structure of the paper proceeds as follows. Section 2 develops the epistemological foundation by
examining the role of confirmation in knowledge. Section 3 introduces the signal-based model of
reality access. Sections 4 and 5 apply this model to internal mental states and memory. Section 6
outlines physical and logical constraints that bound what can be known. Sections 7 and 8 extend the
analysis to digital systems, simulation, and detection mechanisms. Later sections explore
implications for communication, identity, and speculative claims about reality. The paper concludes
by synthesizing these elements into a unified framework and outlining its broader implications.
In sum, this work seeks to articulate a simple but far-reaching idea: we do not access reality
directly—we access it through signals, and we understand it through inference.
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2. Epistemological Foundations: Confirmation and Knowledge
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2.1 Confirmation as a Requirement for Knowledge
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A central claim of this framework is that Knowledge, within this framework, is defined as requiring
confirmation. While beliefs can arise from intuition, authority, or assumption, knowledge demands
some form of verification grounded in accessible evidence.
This distinction can be stated simply:
• Belief: accepting that something is the case
• Knowledge: accepting that something is the case with sufficient confirmation
Importantly, credibility is not equivalent to confirmation. One may believe a claim because it is
presented by a trusted source, but such belief does not constitute knowledge unless it is supported
by independently verifiable evidence. Persuasion, agreement, or confidence—even when widespread—
do not transform a claim into a confirmed fact.
This has a critical implication:
> A statement can be widely believed and still not be known.
Thus, knowledge is not defined by social consensus, authority, or subjective conviction, but by the
presence of confirming signals or evidence that can, in principle, be examined and evaluated.
2.2 The Limits of Confirmation
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While confirmation is necessary for knowledge, it is not universally attainable. There are cases in
which confirmation itself becomes constrained or even impossible, revealing limits inherent to
epistemic access.
Consider the following tension:
• If knowledge requires confirmation,
• and confirmation requires detectable signals or evidence,
• then anything that produces no detectable signal cannot be confirmed.
This leads to an important boundary condition:
> There may exist truths that are ontologically real but epistemically inaccessible.
In other words, something may be true about reality even if no observer can confirm it, because the
relevant signals were never produced, have been lost, or are fundamentally undetectable.
A more subtle issue arises when considering self-confirmation. For example, the idea that one must
"confirm that one has thoughts" leads to a paradox-like structure: the act of attempting
confirmation presupposes the very thinking it seeks to verify. This suggests that not all forms of
awareness depend on explicit confirmation, and that some foundational aspects of cognition may
operate prior to or independently of reflective verification.
Thus, while confirmation is required for knowledge claims, the capacity to confirm is itself
limited, both by the structure of reality and by the structure of cognition.
2.2.1 Reflexivity and the Stability of Confirmation
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The requirement that knowledge depends on confirmation raises a potential regress problem:
• Knowledge requires confirmation
• Confirmation requires detectable signals
• Signals must be interpreted
• Interpretation itself would seem to require confirmation
This appears to generate an infinite regress, in which each level of validation demands further
validation.
Within this framework, this regress is not resolved by identifying an absolute, self-justifying
foundation. Instead, it is stabilized through iterative, self-correcting processes.
Several features contribute to this stabilization:
1. Iterative refinement
Interpretations are continuously updated in light of new signals. Errors are not eliminated at a
single step but are progressively reduced through repeated cycles of detection and correction.
2. Cross-validation
Independent sources of signals—whether from different observers, instruments, or methods—can be
compared. Convergence across independent channels increases reliability without requiring absolute
certainty.
3. Coherence and constraint
Interpretations are evaluated based on their consistency with other well-supported interpretations
and with known physical, logical, and computational constraints. Incoherent interpretations are
progressively discarded.
4. Predictive reliability
Interpretations that successfully predict future signals gain credibility. Predictive success
provides a practical criterion for reliability, even in the absence of ultimate verification.
From this perspective:
> Confirmation is not a terminal state, but a dynamically maintained condition of increasing
reliability within structured constraints.
This leads to a revised understanding of knowledge:
• Knowledge does not require absolute certainty
• Knowledge consists of well-supported, iteratively refined interpretations of signals
• Reliability emerges from structured interaction with signals, not from a foundational guarantee
Thus, the apparent regress does not undermine the framework. Instead, it reflects a fundamental
feature of epistemic systems:
> All knowledge is maintained within a self-correcting, signal-dependent process rather than
grounded in an unchallengeable starting point.