If All fashion fads are products of commercial brainwashing is true, what is the truth value of the following statements? a. No fashion fads are products of commercial brainwashing. b. Some fashion fads are products of commercial brainwashing. c. Some fashion fads are not products of commercial brainwashing.
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Textbook Solutions for A Concise Introduction to Logic
Question
If All fashion fads are products of commercial brainwashing is true, what is the truth value of the following statements? a. No fashion fads are products of commercial brainwashing. b. Some fashion fads are products of commercial brainwashing. c. Some fashion fads are not products of commercial brainwashing.
Solution
Step 1 of 4
The traditional square of opposition is an arrangement of lines that illustrates logically necessary relations among the four kinds of categorical propositions.
It is represented as follows:
The four relations in the traditional square of opposition are characterized as follows:
Contradictory= Opposite truth value
Contrary =at least one is false (not both true)
Sub contrary =at least one is true (not both false)
Sub alternation=truth flows downwards, falsity flows upward
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