The Single Arrow ( ) Introduced by sufficient and necessary words such as: if...then, when, all, every, and only, where both elements are positive or both elements are negative. Example Statement: All X’s are Y’s (X and Y both positive) Diagram: X Y Example Statement: If you are not T, then you are not V (T and V both negative
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ariaf92 - (no access) - Formal Logic.pdf, p1
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