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CC Intro Logic 11-18

Introductory Logic by James Nance & Douglas Wilson, 4th ed.

Tell the process for changing a sentence into standard form. 1. Identify and write down the entire subject. 2. Choose the proper "to be" verb. 3. Rewrite the entire predicate as a predicate nominative (a noun).
Quantity of statement Identifies whether the statement is Universal (all and no) or particular (some and some...not)
Quality of statement Identifies whether the statement is affirmative or negative.
"A" statements are... Universal affirmative
"E" statements are... Universal negative
"I" statements are... Particular affirmative
"O" statements are... Particular negative
Contradiction Always have opposite truth values (A&O) (I&E)
Contrariety Can both be false but can't both be true. (A&E)
Subcontrariety Cab both be true but can't both be false. (I&O)
Subimplication If the universal is true, then the particular must be true. (A-I) (E-O)
Superimplication If the particular is false, then the universal must also be false. (I-A) (O-E)
Created by: kirasayler