A hypothesis is falsifiable if some possible empirical outcomes conflict with it under specified testing assumptions. Falsifiability does not mean that an anomalous reading identifies which member of a theoretical package is false, or that a falsifiable statement is well supported.
A methodology emphasizing conjectures exposed to demanding attempts at refutation. Falsifiability is a property of claims under testing assumptions; falsificationism is a view about scientific practice.
An intersubjectively testable report of an observable occurrence in specified circumstances, capable of participating in a test or attempted falsification. In Karl Popper's account, accepting a basic statement is provisional and may be reopened by further testing.[ref]
The Logic of Scientific Discovery by Karl Popper. Sections 28–30
Karl Popper's appraisal of a conjecture's survival of demanding tests relative to accepted basic statements. It is a retrospective methodological assessment, distinct from a proof of truth or an inductive probability of truth.[ref]
The Logic of Scientific Discovery by Karl Popper. Sections 82–84
