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Philosophy 103: Introduction to Logic
Quiz: Testing Syllogisms 

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This quiz is based on the following notes:
Venn Diagrams

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TESTING SYLLOGISMS ANSWERS

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Directions: Test the following syllogisms for validity by means of Venn Diagrams.

1. All pollution-free devices are completely efficient machines.
No automobiles are completely efficient machines.
No automobiles are pollution-free devices.

DIAGRAM

 


2. No logic teachers are benevolent persons.

Some dictators are benevolent persons.
Some dictators are not logic teachers.

DIAGRAM

 


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