for
Section 2: Logical Equivalence, Tautologies and Contradictions
![]() | 1. Statements and Logical Operators | ![]() | 2. Logical Equivalence, Tautologies ... | ![]() | 3. The Conditional and the Biconditional | ![]() | Main Logic Page | ![]() | "Real World" Page |
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27. (~p)p
29. (~p)q
31. p((~p)
(~q))
33. (p(~p))
(p
q)
35. Either I am not Julius Caesar or you are not a fool.
37. It's raining and I have forgotten either my umbrella or my hat.
39. My computer crashes when it has been on a long time, the air is not dry, and the moon is full.
41. The warning light will come on if the pressure drops and either the temperature is high, the emergency override is not activated, or the manual controls are not activated.
![]() | 1. Statements and Logical Operators | ![]() | 2. Logical Equivalence, Tautologies ... | ![]() | 3. The Conditional and the Biconditional | ![]() | Main Logic Page | ![]() | "Real World" Page |
![]() | Return to Exercises |
![]() | Stefan Waner (matszw@hofstra.edu) | ![]() | Steven R. Costenoble (matsrc@hofstra.edu) |