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 the truth and falshood of Hypotheticall propositions, and first, of the Conditionall.

WHat is to be considered, to know the truth or falshood of Conditionall Propositions?

First, whether they be affirmatiue or nega∣tiue: for in the affirmatiues it sufficeth, that the one part doth necessarily follow of the o∣ther, as thus: If it be a man, it is a sensible body: and it ma∣keth no matter, though the parts seuerally taken, be both false, so as the Cousequent be good: as, If a tree be a man, a tree is a sensible bodie: for though both these parts be false, yet the

Consequent conditionally is true: for a conditionall Proposi∣tion hath no regard to the truth of the parts, but onely that the Consequent may necessarily follow of the Antecedent.

How is the truth of the negatiue Proposition to be knowne?

By the Consequent: for if the Consequent bee not rightly inferred of the antecedent, then the negatiue is true, as thus: it followeth not that because a Lyon is a sensible body, that therefore a Lyon is a man.