Quote from GentlemanGustaf »
sure, we can stick to just deduction, but why, when induction has given us science?
And once we're allowing induction, induction of other people's induction seems quite reasonable, too.
Science doesn't allow ad hominem attacks either, double-blind peer-reviewed studies being the gold standard. You don't trust a study just because a Harvard professor published it. You see how well the study was designed and how frequently the results have been replicated.