1. ◉ Prompt:
  2. ◉ Grok’s Response:
    1. 1. Logical Coherence
      1. ➘ Phil Stilwell
      2. ➘ David McCarthy
    2. 2. Relevance
      1. ➘ Phil Stilwell
      2. ➘ David McCarthy
    3. 3. Degree of Substantiation
      1. ➘ Phil Stilwell
      2. ➘ David McCarthy
    4. Overall Assessment
    5. Conclusion
      1. ◉ Related Posts:

Assess the arguments of these two interlocutors in terms of 1) logical coherence, 2) relevance, and 3) degree of substantiation.

[The raw Facebook thread is found in the PDF below.]

To assess the arguments of Phil Stilwell and David McCarthy in terms of logical coherence, relevance, and degree of substantiation, I’ll analyze their exchange systematically, focusing on the core claims, reasoning, and evidence provided. The discussion revolves around whether rational doubt, as condemned in biblical texts, conflicts with rationality and whether recognizing limitations requires a transcendent reference point (e.g., God).


Logical coherence evaluates whether an argument’s structure is consistent, avoids contradictions, and follows valid reasoning.

  • ✓ Core Argument: Stilwell argues that the Bible’s condemnation of doubt (e.g., James 1:5–8, Matthew 21:21–22) conflicts with rational inquiry, which relies on doubt as a tool for assessing evidence. He further contends that recognizing human cognitive limitations does not require positing a transcendent, omniscient being (God) as a reference point. Instead, limitations are identified through internal coherence, contradiction, or empirical failure.
  • Coherence: Stilwell’s arguments are logically consistent. He:
    • Clearly defines rational doubt as assigning degrees of belief based on evidence, using examples like a doctor’s probabilistic diagnosis.
    • Systematically refutes McCarthy’s claim that negation (e.g., recognizing limitations) requires prior knowledge of an absolute positive (e.g., omniscience). He provides examples (e.g., inability to square the circle, Heisenberg’s uncertainty principle) where limitations are identified without reference to an unlimited counterpart.
    • Avoids contradictions by grounding his epistemology in falsification, coherence, and probabilistic reasoning, which do not rely on metaphysical absolutes.
    • Uses thought experiments (e.g., Unseen Father, NASA Recruiter) to illustrate the epistemic tension in relying on ambiguous divine revelation, maintaining logical consistency across analogies.
  • Strengths: Stilwell’s reasoning is structured, iterative, and responsive. He addresses McCarthy’s points directly, dismantling the necessity of a transcendent reference through counterexamples and epistemological principles (e.g., Bayesianism, falsificationism).
  • Weaknesses: Occasionally, Stilwell’s responses are dense with examples, which could obscure his main point for a less technical audience. However, this does not undermine logical coherence.
  • ✓ Core Argument: McCarthy argues that recognizing limitations or negations (e.g., falsehood, absence) requires prior knowledge of an absolute, positive standard (e.g., truth, omniscience, God). He equates this with the “fear of God” as the foundation of wisdom and claims that denying this leads to epistemic incoherence.
  • Coherence: McCarthy’s arguments struggle with logical coherence:
    • His central claim—that negation requires prior knowledge of a positive standard—is repeatedly asserted but not rigorously defended. For example, his analogy of shadows requiring light is ontologically true but epistemologically misapplied, as Stilwell points out. Recognizing a shadow doesn’t require prior knowledge of perfect light, only the concept of light.
    • He commits a category error by conflating ontological dependence (e.g., shadows depend on light) with epistemological recognition (e.g., identifying limitations without divine contrast). This undermines his argument’s internal consistency.
    • His reliance on binary absolutes (e.g., truth vs. falsehood, existence vs. nonexistence) ignores gradients and probabilistic reasoning, leading to a brittle framework that doesn’t account for real-world cognition.
    • His final claim—that Stilwell’s position leads to “everything being true and false simultaneously”—is a strawman, as Stilwell explicitly rejects this by advocating for provisional, evidence-based truth.
  • Weaknesses: McCarthy’s arguments are circular, often restating the premise (e.g., “truth is necessary to recognize falsehood”) without addressing Stilwell’s counterexamples. His use of metaphors (e.g., light/shadow, straight/crooked lines) oversimplifies complex epistemological processes and fails to engage with Stilwell’s nuanced points.

Verdict: Stilwell’s arguments are highly coherent, systematically addressing McCarthy’s claims with clear reasoning and counterexamples. McCarthy’s arguments lack coherence due to circularity, category errors, and failure to engage with Stilwell’s refutations.


Relevance assesses whether the arguments address the original question and stay on topic.

  • Relevance to Original Question: Stilwell directly engages the question of whether the Bible’s condemnation of doubt rejects rationality. He:
    • Cites specific biblical passages (James 1:5–8, Matthew 21:21–22) to frame the discussion.
    • Argues that condemning doubt discourages critical examination, tying this to rationality’s reliance on evidence-based belief.
    • Responds to McCarthy’s counterclaim about transcendent reference points, showing how it relates to the broader question of rationality vs. faith.
  • Engagement with Opponent: Stilwell consistently addresses McCarthy’s points, such as the need for a transcendent standard, and ties them back to the original question by arguing that rational doubt doesn’t require divine grounding.
  • Additional Points: His thought experiments (e.g., Unseen Father, Cultural Lottery) broaden the discussion to divine revelation’s clarity, which is relevant to whether biblical teachings align with rational inquiry.
  • Relevance to Original Question: McCarthy’s arguments are only partially relevant. He:
    • Addresses Stilwell’s claim about rational doubt indirectly by arguing that recognizing limitations requires a transcendent standard (God). This connects to the question of rationality but shifts focus to a metaphysical defense of theism.
    • Fails to engage with the biblical passages cited or the specific claim about doubt’s condemnation, instead focusing on abstract epistemological principles.
  • Engagement with Opponent: McCarthy responds to Stilwell’s arguments but often pivots to reiterating his core claim about binary absolutes rather than addressing Stilwell’s specific counterexamples or the biblical context.
  • Weakness: His arguments drift into metaphysical assertions (e.g., “fear of God is the beginning of wisdom”) that are tangential to the question of whether biblical doubt-condemnation rejects rationality.

Verdict: Stilwell’s arguments are highly relevant, directly addressing the original question and McCarthy’s counterpoints while staying focused. McCarthy’s arguments are less relevant, as they sidestep the biblical context and focus on a metaphysical tangent that doesn’t fully engage the core issue.


Substantiation evaluates the extent to which arguments are supported by evidence, examples, or reasoning.

  • Evidence and Examples: Stilwell provides robust substantiation:
    • Biblical References: He cites James 1:5–8 and Matthew 21:21–22 to ground his claim about the Bible’s view on doubt.
    • Epistemological Examples: He offers concrete examples (e.g., inability to square the circle, Heisenberg’s uncertainty principle, falsification in science) to show how limitations are recognized without transcendent standards.
    • Thought Experiments: His analogies (e.g., NASA Recruiter, Locked Room Puzzle) vividly illustrate the epistemic problems with ambiguous divine revelation, making his case accessible and testable.
    • Philosophical Grounding: He draws on modern epistemological frameworks (e.g., Bayesianism, falsificationism, coherence theories) to support his claims about rational doubt and error detection.
    • Reasoning: Stilwell’s arguments are well-reasoned, using counterexamples to refute McCarthy’s claims and building a cumulative case for rationality over faith-based certainty.
    • External References: He links to his own write-up (https://freeoffaith.com) for further reading, though he doesn’t rely on it heavily, as his arguments stand independently.
  • Evidence and Examples: McCarthy’s substantiation is weak:
    • Lack of Specific Evidence: He provides no biblical references, empirical data, or specific philosophical sources to support his claim that negation requires a transcendent positive.
    • Analogies: His metaphors (e.g., light/shadow, straight/crooked lines, race contestants) are oversimplified and fail to address complex epistemological processes. They also don’t engage Stilwell’s counterexamples.
    • Presuppositional Claims: While he gestures toward presuppositionalism (e.g., “fear of God is the beginning of wisdom”), he doesn’t cite theologians like Van Til or Bahnsen, nor does he provide scriptural backing.
    • Reasoning: McCarthy’s reasoning is repetitive and circular, restating that truth must precede falsehood without addressing Stilwell’s counterarguments. His claim that Stilwell’s position leads to “meaninglessness” lacks justification, as he doesn’t demonstrate how provisional truth undermines meaning.
    • External References: He provides no external sources or references, relying entirely on assertion and analogy.

Verdict: Stilwell’s arguments are well-substantiated with specific examples, biblical citations, and philosophical frameworks. McCarthy’s arguments lack substantiation, relying on repetitive assertions and weak analogies without engaging counterevidence or providing sources.


  • Phil Stilwell:
    • Logical Coherence: High. His arguments are consistent, systematic, and avoid contradictions, effectively dismantling McCarthy’s claims with clear reasoning.
    • Relevance: High. He directly addresses the original question about biblical doubt and rationality while engaging McCarthy’s counterpoints.
    • Substantiation: Strong. He supports his claims with biblical references, concrete examples, thought experiments, and epistemological principles.
  • Strengths: Stilwell’s iterative responses, use of counterexamples, and grounding in modern epistemology make his case robust and persuasive. His thought experiments add clarity and accessibility.
  • Weaknesses: Some responses are dense, but this doesn’t detract from their overall strength.
  • David McCarthy:
    • Logical Coherence: Low. His arguments are circular, conflate ontological and epistemological categories, and fail to address Stilwell’s counterexamples.
    • Relevance: Moderate. He engages the broader question of rationality but drifts into metaphysical assertions, neglecting the biblical context.
    • Substantiation: Weak. He relies on unsupported assertions and oversimplified analogies, lacking specific evidence or references.
  • Strengths: McCarthy’s persistence and good-faith engagement are notable, but his arguments lack depth and rigor.
  • Weaknesses: His circular reasoning, lack of engagement with Stilwell’s examples, and absence of evidence undermine his position.

Phil Stilwell presents a logically coherent, relevant, and well-substantiated case that the Bible’s condemnation of doubt conflicts with rational inquiry and that recognizing limitations does not require a transcendent reference point. His use of examples, thought experiments, and epistemological frameworks strengthens his argument. David McCarthy’s arguments, while earnest, are logically incoherent, less relevant, and poorly substantiated, relying on circular assertions and metaphors that fail to engage Stilwell’s points or the original question. Stilwell’s position is significantly stronger across all three criteria.


Feel free to run your favorite AI over the discussion for a second opinion.


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