David Hume argued that all ideas are derived from sensory impressions — experience is the bedrock of knowledge. Testimony should be trusted only when it is supported by our accumulated experience of the reliability of similar testimony.
Applied to expertise: We should trust expert testimony to the extent that experts have a demonstrated track record of accuracy in their domain, verifiable by experience.
Objection: This places an impossibly high bar on testimony acceptance. Most people cannot independently verify medical, scientific, or legal expertise. If Hume’s standard were rigorously applied, we would know almost nothing.
Reid argued that we have a natural principle of credulity — a default disposition to believe what others tell us. This is not naivety but a rational starting point: testimony is presumptively credible unless we have specific reasons for doubt. Without this, epistemic life is impossible.
Connection to expertise: We are entitled to defer to experts as epistemic authorities in their domain — we don’t need to reconstruct their evidence from scratch.
Miranda Fricker argues that our practices of assigning credibility to testimony are shaped by identity prejudices (sexism, racism). When we deflate the credibility of a speaker because of their gender or race, we commit testimonial injustice — a form of epistemic harm.
Implication for experience and testimony: The testimonial accounts of marginalised groups may be epistemically valuable precisely because they describe experiences that dominant groups lack direct access to — dismissing such testimony is both unjust and epistemically self-impoverishing.
W.K. Clifford argued that “it is wrong always, everywhere, and for anyone, to believe anything upon insufficient evidence.” We have a strict epistemic duty to proportion our beliefs to the evidence.
Argument: Beliefs drive actions; unjustified beliefs can cause harm. A ship owner who believes his ship is seaworthy without adequate investigation, and the ship sinks, is morally responsible for the resulting deaths — even if he sincerely believed it was safe.
Implication: We have duties not just to ourselves but to others to believe responsibly — because beliefs shape actions, which affect the world.
William James argued (against Clifford) that in genuine options — cases where the evidence is insufficient, the choice is forced, and the stakes are significant — we may believe on the basis of practical necessity. Refusing to believe when one cannot verify is itself a choice with costs.
Implication: In cases of profound uncertainty (religion, love, commitment), requiring Cliffordian evidential standards before belief imposes a paralysis that itself does harm.
Comparative point: Clifford and James offer contrasting models of epistemic responsibility — duty to evidence vs. permission to choose.
When you discover that an epistemic peer — someone as rational and as well-informed as you — disagrees with you, you should move significantly toward their position or suspend judgment. The disagreement is evidence that one of you has made an error; since you cannot know which, you should not simply dismiss the disagreement.
Key thinker: Richard Feldman argues that epistemic peers who disagree should both suspend judgment.
An alternative view (e.g., Kelly, van Inwagen): even when an epistemic peer disagrees, you should maintain your position if your own evidence and reasoning genuinely support it. The mere fact of disagreement does not equal evidence against your view.
Example: Two equally competent philosophers have examined the same argument and reached opposite conclusions. Must each suspend judgment? The steadfast view says no — if I have done my reasoning carefully, the disagreement is a puzzle, but not a reason to abandon my justified position.
We should respond differently to peer disagreement depending on the type of question: in mathematics and logic, where there are correct answers, disagreement is stronger evidence of error than in matters of value and interpretation.
VCAA FOCUS: The Clifford–James debate on epistemic responsibility and the conciliationist–steadfast debate on peer disagreement are key set-text material. Know both positions, their key premises, and one objection to each.
EXAM TIP: When answering questions about these viewpoints, always identify the specific premise that each thinker is defending, not just their conclusion.
REMEMBER: These questions are not merely theoretical — they arise in everyday epistemic life: how much should I rely on my doctor’s advice? Should I change my mind when a friend disagrees? Connecting the abstract to the concrete demonstrates philosophical fluency.
