Question 1204396
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Since I can't see your textbook, I can only guess what the author wants.

Under the K's you write TTTTFFFF
Under the M's you write TTFFTTFF (there are M's in the conclusion, so we skip.
Under the H's you write TFTFTFTF

Since the conclusion is a conditional statement, it's the only thing we
need to consider".  Only "T ⊃ F" fails.

K ⊃ (M ∨ ∼ H) / M ⊃ H / M ⊃ K // K ⊃ H
                                   T   T 
                                   T   F  <-- fails because T cannot imply F.
                                   T   T
                                   T   F  <-- fails because T cannot imply F.
                                   F   T
                                   F   F
                                   F   T
                                   F   F

It is not valid because it fails in lines 2 and 4.

Edwin</pre>