Question
$(p \rightarrow q) \rightarrow (\sim p\ v \sim q)$

Answer

Truth table:
  $1$ $2$ $3$ $4$ $5$ $6$ $7$
$p$ $q$ $\sim p$ $\sim q$ $p \rightarrow q$ $\sim p\ v\ \sim q$ $(p \rightarrow q) \rightarrow (\sim p\ v\ \sim q)$
$1$ $T$ $T$ $F$ $F$ $T$ $F$ $F$
$2$ $T$ $F$ $F$ $T$ $F$ $T$ $T$
$3$ $F$ $T$ $T$ $F$ $T$ $T$ $T$
$4$ $F$ $F$ $T$ $T$ $T$ $T$ $T$
  $1(\sim )$ $2(\sim )$ $1, 2 (\rightarrow)$ $3, 4 (v)$ $5, 6 (\rightarrow)$
Decision of the type of form for the statement: Looking at the above facts, it will be seen that the representation of the given form for the statement is given in column no. Done in $7.$ Looking at all the rows in this column, it will be clear that it has $‘F’$ in the first row and $‘T’$ in the second, third and fourth rows. This means that some of the substitutions of this form for the statement are true, while some of the substitutions are untrue. So it is clear that this form of statement is 'parayat'.

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