n. the condition of admitting falsification: the logical possibility that an assertion, hypothesis, or theory can be shown to be false by an observation or experiment. The most important properties that make a statement falsifiable in this way are (a) that it makes a prediction about an outcome or a universal claim of the type “All Xs have property Y” and (b) that what is predicted or claimed is observable. Austrian-born British philosopher Karl Popper (1902–1994) argued that falsifiability is an essential characteristic of any genuinely scientific hypothesis. Also called disconfirmability; refutability. See risky prediction. —falsifiableadj.