Question

Construct a derivation from the premise to the conclusion.

Premise1: (Y ⊃ B)

Premise2: (B&T) ⊃ D

Premise3: D ⊃∼ Y

Premise4: B ⊃ (O ∨ T)

Premise5: ∼ O

Conclusion: ∼ Y

ex) This is the example from the textbook which I have to do the same for my question only using &, ~, ∨, ≡, ⊃ I, E.

Derive: L & D Assumption Assumption 1-N 2 (NL) & [D = (-N VA)] 3 -NL 4L 5 D = (NVA) 6-NVA 7 D 8 L&D 2 &E 1, 3 DE 2 &E 1 VI 5,

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Answer #1

Derive ~Y : c. 3. 1. YIB 2. (1x1) =) D 2~Y 4. BOVT) 5, 6 cu ( an premise (i) premise (ii) prem enise Cili premise (lv) premis

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