Consider a finite list of n statements:

S₁: At least one of statements S₁-S_n is false.
S₂: At least two of statements S₁-S_n is false.
…
S_n-1: At least n-1 of statements S₁-S_n is false.
S_n: At least n of statements S₁-S_n is false.

Is this a paradox? It depends: The statements form a self-consistent system if n is even, but not if it’s odd.

From Roy T. Cook’s new book Paradoxes — which is dedicated in part to “anyone whom I don’t discuss in this book.”