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MODR 2640 (8)
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Lecture

T September 20, 2011

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Department
Modes Of Reasoning
Course
MODR 2640
Professor
All Professors
Semester
Fall

Description
T September 20, 2011 Tuesday,September 20, 20110:30 AM Valid, invalid-- arguments only True, false-- statements Sound = valid+ true premises Unsound = either invalidor at least one false premise Invalid-- possible that all premises are true and the conclusion false Consistency - A set of statements is inconsistent if it is impossible that all the statements are true. ○ E.g. P, not-P ○ Example: All politicians lie, Pierreis a politician, Pierre never lies Impossibility - Logically impossible (as o
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