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AdvancedLogical EquivalenceProof

Given the premises:

  1. P → Q
  2. R → S
  3. P ∨ R

Prove: Q ∨ S

P → Q, R → S, P ∨ R ⊢ Q ∨ S

Goal: Prove Q ∨ S

Build your proof step by step

1.
P → Q
Premise
2.
R → S
Premise
3.
P ∨ R
Premise