kylat8089 kylat8089 21-03-2024 Mathematics contestada Conditional proof: [(P • Q) • R] ⊃ S / P ⊃ [Q ⊃ (R ⊃ S)] a) P ⊃ [Q ⊃ (R ⊃ S)] b) P ⊃ [Q ⊃ (R ⊃ S)] c) [(P ⊃ (Q ⊃ R)) ⊃ S] d) [(P ⊃ (Q ⊃ S)) ⊃ R]
