Question
Determine the validity of the following arguments using the direct method of truth table:
$\sim P\ v \sim Q$
$\therefore P\ \&\ Q$

Answer

Truth Table:
  Support Statement The resulting statement
  $1$ $2$ $3$ $4$ $5$ $6$
$P$ $Q$ $\sim P$ $\sim Q$ $\sim P\ v \sim Q$ $P\ \&\ Q$
$1$ $T$ $T$ $F$ $F$ $F$ $T$
$2$ $T$ $F$ $F$ $T$ $T^*$ $F^*$
$3$ $F$ $T$ $T$ $F$ $T^*$ $F^*$
$4$ $F$ $F$ $T$ $T$ $T^*$ $F^*$
  $1 (\sim )$ $1, 2(v)$ $3, 4(v)$ $1, 2(\&)$
               
Judgment of the validity of the argument: A total of six columns have been formed in the above fact sheet. In which the column no. Base statement and column no. $6$ is the representation of the result statement. Row out of the total four rows of the truth table. The base statement truth in $2, 3$ and $4$ is $‘T’.$ But all the resulting statements in the same row are untrue $‘F’.$ Hence this argument is disproportionate.

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