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CHAP. XXIX.
Of Moods.
a 1.1 SYllogistick, conclusive Reasons are disposed into Moods. Of Moods there are two kinds, the first simple, properly called a Mood, 〈 in non-Latin alphabet 〉〈 in non-Latin alphabet 〉, defined a kind of figure of the Reason, as thus,
If the first is, the second is, But the first is, Therefore the second is.
(It is observable by the way, that the Stoicks for letters used numbers.) The other compounded, called 〈 in non-Latin alphabet 〉〈 in non-Latin alphabet 〉, as being con∣sistent of both reason and Mood, as,
If Plato liveth, Plato breatheth, But the first, Therefore the second.
This is used in a long Syntax, that it be not necessary to speak a long assumption, or a long inference, but they abbreviate them thus, but the first, therefore the second.
Of Moods or Tropes there are two kinds, one of indemonstra∣bles, so termed, not that they cannot be demonstrated, but be∣cause they conclude so evidently, that they need not be repr••∣ved; the other of demonstrables.
Of Indemonstrable Moods, there are (according to Chrysippus) five, according to* 1.2 others more or lesse.
The first, wherein every reason consists of a connex, and an an∣tecedent from which beginneth the connex, and the consequent is inferred, as,
If the first, then the second, But the first, Therefore the second.
The second indemonstrable is, which, by the consequent of the connex, and the contrary of the consequent, hath a conclusion contrary to the antecedent, as,
If it is day, 'tis light, But it is night, Therefore, it is not day.