An Enthimeme is an vnperfect Syllogisme, made for haste or speed of two Propositions only, (that is) of one of the Premisses, called in this kind of argument the Antecedent, and of the conclusion called heere the Consequent, for the other of the Premisses being supposed to be true and well knowne, is left out of purpose, as a thing superfluous, and not needfull to be recited, and sometime the Maior is left out, as thus: Vo∣luptuousnesse is not perpetuall nor proper, it is not therefore the chiefe felicitie: and sometime the Minor is left out, as heere: Euery good thing maketh his possessor the better, ther∣fore voluptuousnesse is not good.
It is easie to know which of the Premisses is left out by this meanes, for if the Subiect of the Antecedent and of the Con∣sequent be all one, then the Maior is left out, but if they bee not all one, but diuers, then the Minor is left out, as you may see in the two last examples, and the part lacking, being redu∣ced together with the rest into a Syllogisme, will quickly shew the truth or falsehood of the Argument.
They are gathered for the most part from signes, which if they be necessarie, then the Enthimeme also is necessarie, as thus: The woman giueth milke: Ergo, shee hath had a childe, or is with childe; if the signes be probable, then the Enthi∣meme is also probable, as thus: This man is a night-gadder: Ergo, he is a thiefe.