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Classical Conversations Challenge B Logic Lessons 11-18
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For more Challenge vocabulary, view my folder, "Challenge B Logic Vocabulary," of visit my profile, "Takethechallenge." Have fun studying!
Terms in this set (15)
Categorical Statement
A statement that affirms or denies something about a given subject
Subject
The term being described or about which something is asserted
Predicate
The term that describes or asserts something about the subject
Quantity
The scope of a statement's claim about the extension of the subject: universal (entire extension) or particular (partial)
Quality
The positive or negative nature of a statement's claim about the subject: affirmative (asserts something) or negative (denies something)
"A" Statements
Universal Affirmative Statements
"E" Statements
Universal Negative Statements
"I" Statements
Particular Affirmative Statements
Contrary
Two statements are (this) if and only if they can both be false but cannot both be true
Square of Opposition
A diagram of the basic relationships between statements with the same subject and predicate
Contradiction
Two statements are in (this) if and only if they always have opposite truth values
"O" Statements
Particular Negative Statements
Subcontraries
Two statements are (this) if and only if both can be true but cannot both be false
Subimplication
The relationship between a universal and particular statement of the same quality, in which the truth of the universal necessitates the truth of the particular
Superimplication
The relationship between a universal statement of the same quality, in which the falsity of the particular necessitates the falsity of the universal
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