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Fallacy Neccesary Grandfather Green Confusing Conditions Sufficient Undistributed

Fallacy Fallacy of confusing neccesary conditions for neccesary and sufficient conditions.

Fallacy of the undistributed middle
Definition and Examples All students carry backpacks.
My grandfather carries a backpack. Therefore, my grandfather is a student.

"money is green
trees are green
so money must grow on trees."

As the politician's syllogism:

We must do something
This is something
Therefore, we must do this.

Tags: fallacies, logic

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