PHIL 2100 Lecture Notes - Lecture 10: Modus Tollens, Modus Ponens

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copperwalrus817

27 Apr 2016

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Philosophy Seminar #2 – Valid Argument Patterns

Valid Argument Patterns

• Valid

• Modus Ponens

(Affirming the Antecedent)

• Modus Tollens

(Denying the

Consequent)

• Hypothetical

Syllogism

• Disjunctive

Syllogism

• If P than Q

• Either P or Q

• P

• Not Q

• If Q than R

• OR

• If P than R

Not P

• Therefore Q

• There Not P

•

• Therefore Q

Invalid Argument Patterns

Denying the Antecedent

Affirming the Consequent

IF P than Q

If P than Q

Not P

Not Q

Therefore P

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PHIL 2100 Lecture Notes - Lecture 10: Modus Tollens, Modus Ponens

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