Question
Determine the validity of the following arguments using the direct method of truth table:
$A \rightarrow (B\ v\ C)$
$\sim A$
$\therefore B\ v\ C$

Answer

Combining the two bases of this argument as a whole, the argument will be as follows:
$[A \rightarrow (B\ v\ C)]\ \&\ \sim A$
$\rightarrow B\ v\ C$
Truth Table:
  Support Statement The resulting statement
  $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$
$A$ $B$ $C$ $\sim A$ $B\ v\ C$ $A \rightarrow (B\ v\ C)$ $[A \rightarrow (B\ v\ C)]\ \&\ \sim A$ $B\ v\ C$
$1$ $T$ $T$ $T$ $F$ $T$ $T$ $F$ $T$
$2$ $T$ $T$ $F$ $F$ $T$ $T$ $F$ $T$
$3$ $T$ $F$ $T$ $F$ $T$ $T$ $F$ $T$
$4$ $T$ $F$ $F$ $F$ $F$ $F$ $F$ $F$
$5$ $F$ $T$ $T$ $T$ $T$ $T$ $T$ $T$
$6$ $F$ $T$ $F$ $T$ $T$ $T$ $T$ $T$
$7$ $F$ $F$ $T$ $T$ $T$ $T$ $T$ $T$
$8$ $F$ $F$ $F$ $T$ $F$ $T$ $T^*$ $F^*$
  $1 (\sim )$ $2,3 (v)$ $1, 5 (\rightarrow)$ $6, 4 (\&)$ As $5$
Judgment of the validity of the argument: A total of eight columns have been formed in the above fact sheet. In which the column no. $7th$ base statement and column no.$ 8$ is the representation of the result statement. Flowers of the table of truth out of eight rows. The base statement truth in $5, 6, 7$ and $8$ is $‘T’.$ But of the row. The result statement in $8$ is false $‘F’.$ Hence this argument is disproportionate.

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