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Card 8 of 24 · Weak Induction

Personal Incredulity

Argumentum ad ignorantiam (ex incredulitate)

The Trail Card

“I can’t imagine it, so it can’t be true.”

A lack of understanding isn’t evidence against reality.

Example

“I don’t understand quantum physics, so scientists must be making it up.”

Where the reasoning fails

A form of the “argument from ignorance”: treating the limits of one’s own knowledge or imagination as a limit on what is possible.

  1. P1I cannot conceive how C could be true.
  2. P2What I cannot conceive is not true.✕ Off trail here
  3. CTherefore C is false.

Diagnosis: P2 makes the knower the measure of reality. Conceivability is weak evidence at best, and inconceivability to one person is weaker still.

Philosophy & theology examples

  • Philosophical Theology

    “I can’t imagine how God could be three persons and one essence, so the Trinity is incoherent.” Incoherence must be shown by deriving a contradiction, not by reporting difficulty.

  • Apologetics

    “I can’t see how life could arise without design, so it couldn’t have.” Design arguments are stronger when stated positively (probabilities, specified complexity) than as incredulity.

  • Ethics

    “I can’t imagine anyone sincerely holding that view.” Moral imagination is limited; understanding precedes fair judgment.

Trail recovery

Steering back on route

Turn “I can’t imagine” into a research question. In papers, distinguish “I haven’t found an explanation” from “there is no explanation,” and look for the best attempt by someone who thinks it’s possible.

Try saying: “I find that hard to picture too — what’s the best account anyone has given of how it could work?”

Keep questioning. Keep exploring.