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Philosophy 103: Introduction to Logic
Quiz: Successive Immediate Inferences Answers

This quiz is based on the following notes:
Exercises on Successive Immediate Inferences
Strategies for Solving Successive Immediate Inferences

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SUCCESSIVE IMMEDIATE INFERENCES QUIZ

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Directions: Given the truth of "All splitscreens are practicums" what can be validly inferred about the truth or falsity of the following proposition?

"Some nonpracticums are splitscreens."

Note: This statement is the last line in the proof.

Cite the proper logical relation and appropriate truth value for each successive inference. You may abbreviate by using "S" and "P" for the appropriate classes.

Statement

Reason

Truth Value

1. All splitscreens are practicums given true
2.  No splitscreens are nonpracticums. obversion true
3.  No nonpracticums are splitscreens. conversion true
4.  Some nonpracticums are splitscreens. contradiction false
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