The arte of logick Plainely taught in the English tongue, according to the best approued authors. Very necessary for all students in any profession, how to defend any argument against all subtill sophisters, and cauelling schismatikes, and how to confute their false syllogismes, and captious arguments. By M. Blundevile.

Of Priuatiues.

WHat be Priuatiues?

Priuatiues are two Contraries, belonging to one selfe Subiect, apt to receiue the same, in the which Subiect, when the one is wanting (at such time as Nature doth appoint) the other must needes be.

How may we reason from this place?

Two wayes: first, from Affirmation of the one to the deny∣all of the other, which is common to all Opposites, as thus, He is blind: Ergo, He seeth not. Secondly, you may reason from the denyall of the one to the affirmation of the other, thus: He cannot speake: Ergo, He is dumbe. But this kinde of Ar∣gument is not strong, vnlesse the thing required be applyed to

his proper Subiect, and in such time as nature hath appointed, for it were no good argument to say thus: a sucking child can∣not speake: Ergo, he is dumbe; or thus, a whelpe of two daies old cannot see: Ergo, he is blinde: for nature commonly suf∣fereth not the childe to speake before it be two yeeres old, nor the whelpe to see before it be nine daies olde.

What be the maxims of this place?

If the one bee not in the Subiect apt to receiue the same at such time as nature hath appointed, the other must needs be.