Category logic
What follows
A classic category logic question about reversing a true statement.
Quick answer
Answer: no
All squares are rectangles, but rectangles can have unequal side lengths. So not all rectangles are squares.
How to use it
1
Understand the first category relationship.
2
Try reversing it.
3
Look for counterexamples.
4
Reject the reversed claim.
What this trains
Category logic
Deductive reasoning
Counterexamples
Assumption control
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