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Use the Short Truth-Table Method to Determine Whether the Following →\rarr

Question 20

Short Answer

Use the short truth-table method to determine whether the following is valid or invalid:
P →\rarr (Q & R)
R →\rarr (T v S)
~T v (U & ~W)
P/ ∴\therefore ~W

Correct Answer:

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Invalid: P = T
Q = T...

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