Error

Critical Fallibilism defines an error precisely: a reason that an idea fails at a goal. This makes error goal-relative, not absolute. You cannot judge whether an idea is mistaken without first knowing the goal it is meant to achieve; the goal sets what success and failure look like. CF often sharpens this further to (idea, goal, context) triples, or IGCs, so that error is evaluated against a specified context rather than an idea judged in isolation.

This definition does the load-bearing work in CF’s epistemology. Because ideas are evaluated in a binary way — refuted (has a known error) or non-refuted (no known error) — the concept of error is what draws that line. A criticism is an argument that an idea contains an error; a decisive one identifies a decisive error, meaning a reason the idea actually fails rather than merely a complaint that it is not great. Non-decisive “errors” are compatible with success and so, CF argues, are not really errors for that goal.

CF inherits from Critical Rationalism the view that learning proceeds by error correction, not by justifying ideas as true or probable. We never prove we are right; we make progress by finding and fixing what is wrong. This reframes errors as the engine of knowledge rather than as failures to be avoided or hidden. CF also distinguishes major from minor errors for prioritizing limited attention, treating fallibility as a permanent condition that makes error-finding indispensable.