Abstract

Suppose we say that a deductive argument is probative just in case it is valid in point of logical form, possesses true premises, and is free of informal fallacy. We can then say that an argument is normatively persuasive for a person if and only if it is both probative and has premises that can be accepted, without any breach of epistemic propriety, by the person in question. If the premises of a probative argument would be accepted by any reasonable person, I will call such an argument demonstrative