Chronological snobbery

Name of fallacy Chronological snobbery
Type Irrelevant Argument, Informal Argument
Description Where a thesis is deemed incorrect because it was commonly held when something else, clearly false, was also commonly held.
FormYou argue that A implies B.
A implies B is an old argument, dating back to the times when people also believed C.
C is clearly false.
Therefore, A does not imply B.
Treatment Show that there is not link between time and truth e.g. Mathematical proofs.