Question
(p → q) ↔ (~ p v q)

Answer

Truth table:
  1 2 3 4 5 6
p q ~ p p $\rightarrow$ q ~ p v q (p $\rightarrow$ q)$\rightarrow$ (~ p v q)
1 T T F T T T
2 T F F F F T
3 F T T T T T
4 F F T T T T
  1 (~) 1, 2 ($\rightarrow$) 3, 2 (v) 4, 5 ($\leftrightarrow$)
Decision of the type of form for the statement: Looking at the fact sheet above, it will be seen that the form given for the statement is represented in column 6. The column has all the ‘T’s. This means that all substitutions for this form of statement are true. So it is clear that this form of statement is 'tadevarthaka'.

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