Which of the following is not a condition for a symbolic expression to be a well-formed formula (WFF)?
A) If p is a WFF, then so is ~(p).
B) If p and q are WFFs, then so is (p • q).
C) If p and q are WFFs, then so is (p ⋁ q).
D) If p and q are WFFs, then so is (p → q).

Question

Quizplus · Accepted Answer

If p is a WFF, then so is ~(p) is not a condition for a symbolic expression to be a well-formed formula (WFF).

Which of the Following Is Not a Condition for a Symbolic