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Bootyshaker Bootyshaker
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Consider this proof, (1.) (~I ⊃ ~E) • (~E ⊃ E) (2.)~I /∴ I (3.) ~I ⊃ ~E (4.) ~ ~ E ⊃ ~ ~I (5.) E ⊃ I (6.) ~ E (7.) (~E ⊃ E) • (~I ⊃ ~E) (8.) ~E ⊃ E (9.) E (10.) ~ ~ E (11.) ~ ~ I (12.) I What is the justification for line 9?

▸ 8, 6 MT

▸ 8, 6 MP

▸ 8, 5 MP
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How to Think Logically


Edition: 2nd
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DratiniDratini
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8, 6 MP

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