The Valid Moods of Each Figure PDF
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This document explains the valid moods for each of the four figures of syllogistic reasoning. It outlines the rules and valid moods for each figure. It's a helpful resource for those studying logic or philosophy.
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The Valid Moods of Each Figure The First Figure – (Sub-Pre) Rules of the First Figure: 1. The major premise must be universal ( A or E) 2. The minor premise must be affirmative (A or I) Valid Moods: (AAA, AII, EAE, and EIO) The Second Figure – (Pre – Pre) Rules of the Second Figure: 1. The major pr...
The Valid Moods of Each Figure The First Figure – (Sub-Pre) Rules of the First Figure: 1. The major premise must be universal ( A or E) 2. The minor premise must be affirmative (A or I) Valid Moods: (AAA, AII, EAE, and EIO) The Second Figure – (Pre – Pre) Rules of the Second Figure: 1. The major premise must be universal (A or E) 2. One premise must be negative (E or O) Valid Moods: (AEE, AOO, EAE and EIO) The Third Figure – (Sub – Sub) Rules of the Third Figure: 1. The minor premise must be affirmative. 2. The conclusion must be particular Valid Moods: (AAI, AII, EAO, EIO, IAI and OAO) The Fourth Figure- (Pre – Sub) Rules of the Fourth Figure: 1. If the major premise is affirmative, the minor premise must be universal. 2. If the minor premise is affirmative, the conclusion must be particular. 3. If a premise (and the conclusion) is negative, the major premise must be universal. Valid Moods: (AAI, AEE, EAO, EIO and IAI)
