Logical paradoxes

thought experiment concerning the continuity of identity of an item which has all its parts replaced

thought experiment proposed by David Hilbert

paradox that a heap of sand and a heap of sand minus one grain is also a heap, then one grain of sand is a heap

philosophical paradox: why is it that observing a black raven is evidence for “all ravens are black”, but observing a nonblack nonraven is not?

colloquial version of Russell’s paradox: does a barber, who shaves all those — and those only — who do not shave themselves, shave himself?

situation in which an individual cannot or is incapable of avoiding a problem because of contradictory constraints or rules

self-referential paradox

logical paradox

apparent logical paradox