18/24 Some even declare that it is given as a necessary inference; and on this ground Sigwart rejects particular hypotheticals, such as _Sometimes when A is B, C is D_; for if it happens only sometimes the connexion cannot be necessary. Indeed, it cannot even be probably inferred without further grounds. But this is also true whenever the antecedent and consequent are concerned with different matter. For example, _If the soul is simple, it is indestructible_. How do you know that? |