Extraordinary proof? This seems too high to me. You need to strike the right balance between diagnosing dishonesty when it doesn’t exist and failing to diagnose it when it does. Both types of errors have serious costs. Given the relatively high prevalence of deception among humans (see e.g. this book), I would be very surprised if requiring “extraordinary proof” of dishonesty produced the best consequences on balance.
Extraordinary proof? This seems too high to me. You need to strike the right balance between diagnosing dishonesty when it doesn’t exist and failing to diagnose it when it does. Both types of errors have serious costs. Given the relatively high prevalence of deception among humans (see e.g. this book), I would be very surprised if requiring “extraordinary proof” of dishonesty produced the best consequences on balance.