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Philosophy 103: Introduction to Logic
Quiz: Mixed Syllogistic Forms Answers

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This quiz is based on the following notes:
Disjunctive and Hypothetical Syllogisms

Argument Forms and Arguments

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  MIXED SYLLOGISTIC FORMS QUIZ

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Directions: Identify the following syllogistic forms by name and state whether they are valid or invalid.

1. If p, then q
p_______
q
Form:  modus ponens Evaluation:  valid
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2. If p, then q
Not q___
Not p
Form:  modus tollens Evaluation:  valid
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3. If p, then q
If q, then r
If p, then r.
Form:  hypothetical syllogism Evaluation:  valid
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4. If p, then q
q________
p
Form:  fallacy of affirming the consequent Evaluation:  invalid
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5. If p, then q.
Not p.
Not q.
Form:  fallacy of denying the anteceedent Evaluation:  invalid

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