Fallible Ideas
also FI
Elliot Temple's pre-CF body of philosophy and its discussion community, synthesizing Popper, Rand, Deutsch, and Godwin, which Critical Fallibilism develops further.
Fallible Ideas (FI) is the name Elliot Temple gave to his earlier body of philosophical work and to the discussion community organized around it, before he formulated Critical Fallibilism (CF) in 2021. FI synthesized several traditions: Karl Popper’s Critical Rationalism, Ayn Rand’s Objectivism, David Deutsch’s extensions of CR, and William Godwin’s writing on reason and persuasion. Its core stance is in the name — all ideas are fallible, so knowledge grows by exposing ideas to criticism and error correction rather than by seeking justification or proof.
FI is best understood as CF’s direct predecessor rather than a rival school. Much of CF’s machinery descends from FI commitments: the rejection of justificationism and induction, the priority of refuting ideas over supporting them, the emphasis on open debate and paths forward so that error correction is never blocked, and the integration of Objectivist ethics with Popperian epistemology.
CF does not repudiate FI; it sharpens it. Where FI inherited CR’s looser talk of better and worse ideas, CF insists on a strictly binary evaluation — an idea is refuted or non-refuted relative to an IGC triple — and denies that arguments come in strengths or that ideas carry credences. So FI supplies the philosophical lineage and many supporting concepts, while CF is the more precise development built on that foundation.