Question: Consider the wffs: 1 p1 (p2 (p3 p4)) 2 (p1 p2 p3) p4 (a) Technically speaking, neither 1 nor 2 is well-formed since neither is

Consider the wffs: 1 p1 (p2 (p3 p4)) 2 (p1 p2 p3) p4

(a) Technically speaking, neither 1 nor 2 is well-formed since neither is allowed by the formal syntax of propositional logic. Correct them. Note, however, that we will freely make such trivial errors throughout this semester (as do most such courses).

(b) Use truth tables to show that 1 2.

(d) State the number of rows in a truth table for proving the extension.

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