Logic Quizzes, Questions & Answers

Recent Logic Quizzes

Logical thinking is the ability to make deductions that lead rationally to a certain conclusion. It is important to have good logic skills because they help you think things through and they also give you a good understanding...

Questions: 6 | Attempts: 113 | Last updated: Oct 11, 2025

Sample Question
1. At the end of a banquet 10 people shake hands with each other. How many handshakes will there be in total?

100

20

45

50

90

Validity And Soundness - Practice Exercises

Validity and Soundness - Practice Exercises

Determine whether each of the following arguments are VALID and/or SOUND. Remember: A valid argument is one whose conclusion is guaranteed if we assume that its premises are true, and a sound argument is one that is valid and...

Questions: 5 | Attempts: 11304 | Last updated: Jul 5, 2025

Sample Question
Either President Lincoln was assassinated, or he was killed in an accident. President Lincoln was not killed in an accident. Therefore, President Lincoln must have been assassinated.

Check here if the argument is VALID.

Check here if the argument is SOUND.

Check here if the argument is NEITHER valid NOR sound.

Logic Chapter 4

This is based off of Concise Introduction to Logic 10th editionby Patrick J Hurley

Questions: 34 | Attempts: 522 | Last updated: Mar 20, 2025

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