[24-1] Explain what the three dichotomies of modality are; and
Explain why there are discordance as well as harmony
among them.
[24-2] Determine which of the following sentences are
tautologies, which are contradictions, and which are
contingent.
Show your results in Truth Tables.
(extracted from textbook exercise 3-6)
1. ~(A & ~A)
2. A V (A -> B)
3. A <-> (B v ~ B)
