3. Normal Modal Propositional Logic
Topic
10/3/08 10 Software under construction.
K Modal Trees
Close the following trees using S5. Then go to the Rule Set Menu and change the rules to K, then try to close the trees a second time.
priest
1 Propositional Logic
Logical System
10/3/08 10 Software under construction.
Propositional Logic
a) P⊃ Q, R⊃ Q ∴ (P∨ R)⊃ Q
b) P⊃ (Q∧R), ¬R ∴ ¬P
c) ∴ ((P⊃ Q)⊃ Q)⊃ Q
d) ∴ ((P⊃ Q)∧ (¬P⊃ Q))⊃ ¬P