Diagramming and Contrapositives

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10 Terms

1
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If A then B

A → B

CP: ~B → ~A

2
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A if and only if B

A <--> B

CP: ~B <--> ~A

3
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If A then not B

A → ~B

CP: B → ~A

4
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If not A then B

~A → B

CP: ~B → A

5
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If A then B and C

A → B AND C

CP: ~B OR ~C → ~A

6
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If A then B or C

A → B OR C

CP: ~B AND ~C → ~A

7
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If A and B then C

A AND B → C

CP: ~C → ~A OR ~B

8
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If A or B then C

A OR B → C

CP: ~C → ~A AND ~B

9
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Sufficient goes on the (left/right)

Left. [S]ufficient is the [S]tart!

10
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Necessary goes on the (left/right)

Right. [N]ecessary is [N]ext!