Reid's Argument

Competing Theories of Testimony

  • Two sharply contrasting accounts of how humans come to trust (or not trust) what others say:
    • Thomas Reid: Trust is innate; we possess a built-in “principle of credulity.”
    • David Hume: Trust must be earned; only justified when backed by evidence that the speaker is reliable.
  • The debate has both descriptive (How do we in fact form beliefs?) and normative (How should we form beliefs?) dimensions.

Reid’s Innate Model

  • Principle of Credulity
    • A hard-wired, “gift of nature” impulse to believe others’ testimony.
    • Strongest in early childhood; later constrained by experience.
  • Principle of Veracity
    • Natural propensity to tell the truth and “convey our real sentiments.”
    • Lying is “doing violence to our nature.”
  • Combined picture: humans are naturally trusting and naturally honest; testimony is a normal, indispensable source of knowledge.

Reid’s Argument From Child Credulity

  • Empirical observation: Young children believe almost anything they are told.
  • Formal structure:
    1. Credulitychildren  is maximal.\text{Credulity}_{\text{children}} \;\text{is maximal.}
    2. If credulity were grounded in experience & reasoning (Hume), it would be minimal in children (they lack experience).
    3. ∴\therefore Credulity is not the product of experience; it is innate.
  • Supporting point: It seems counter-intuitive and morally odd to blame children for their trust; hence their trust cannot be epistemically wrong.
  • Social‐collapse claim: If we rigorously followed Hume’s requirements, “no proposition that is uttered in discourse would be believed,” robbing society of its greatest benefits and leaving us “in a worse condition than that of the savages.”

Ethical & Social Implications According to Reid

  • Widespread distrust would:
    • Undermine cooperation, education, and the transmission of culture.
    • Produce a society poorer than even the most rudimentary communities (“savages”).
  • Hence a natural trust in testimony is both epistemically and practically necessary.

Hume’s Evidential Model

  • No testimony should be accepted without positive evidence that the testifier is reliable.
  • We are, in principle, always “on our own” in forming beliefs; each putative item of testimony demands independent justification.
  • Skeptical posture stems from recognition of human motives to deceive or misreport.

Hume on Sources of Unreliable Testimony

  1. Self-interest & Advantage
    • People may lie when they gain power, money, prestige, or influence (“starting an imposture among an ignorant people”).
    • Modern parallel: political propaganda, advertising.
  2. Love of Wonder
    • Humans enjoy feelings of surprise; tales of distant lands or extraordinary events exploit this bias.
    • Many “travelers’ tales” of Hume’s era were wildly inaccurate, yet avidly believed.
  3. Pleasure of News & Gossip
    • The sheer delight of being the first to share juicy information encourages premature or false testimony.
    • Explains rapid spread of rumors on social media today.

Comparative Summary: Core Disagreements

  • Source of Trust
    • Reid: built-in instinct.
    • Hume: empirical justification required.
  • Typical Reliability of Speakers
    • Reid: honesty is natural; lying aberrant.
    • Hume: lying is common whenever incentives or cognitive biases intervene.
  • Childhood Credulity
    • Evidence for innateness (Reid) vs. an epistemic error needing correction (Hume).
  • Societal Consequences
    • Reid: universal skepticism is disastrous.
    • Hume: cautious skepticism protects us from deception.

Real-World Relevance & Connections

  • Education & Parenting: Reid’s view supports a developmental pedagogy that respects children’s default trust while gradually teaching critical scrutiny.
  • Media Literacy: Hume’s insights anticipate modern concerns about misinformation, “fake news,” and viral rumors.
  • Philosophical Epistemology: The dispute echoes broader debates over foundationalism vs. coherentism and internalism vs. externalism about justification.
  • Ethics & Civic Life: The balance between reasonable trust (Reid) and justified doubt (Hume) remains central to democratic discourse, law, and science.