Question
Either truth wins or truth is defeated.
Truth is not defeated.
Therefore, truth prevails.

Answer

Hint: $P =$ Truth wins.
$Q =$ Truth is defeated.
Symbolic representation of the argument:
$P\ v\ Q$
$\sim Q$
$\therefore P$
Combining the two bases of this argument as a whole, the argument will be as follows:
$(P\ v\ Q)\ \& \sim Q$
$\therefore P$
Truth Table:
  Support statement The resulting statement
  $1$ $2$ $3$ $4$ $5$ $6$
$P$ $Q$ $\sim Q$ $P\ v\ Q$ $(P\ v\ Q)\ \&\ \sim Q$ $P$
$1$ $T$ $T$ $F$ $T$ $F$ $T$
$2$ $T$ $F$ $T$ $T$ $T^*$ $T^*$
$3$ $F$ $T$ $F$ $T$ $F$ $F$
$4$ $F$ $F$ $T$ $F$ $F$ $F$
  $2 (\sim )$ $1, 2(v)$ $4, 3 (\&)$ As $1$
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. Out of the total four rows of the truth table, only rows. The base statement in $2$ is the truth $‘T’$ and the result statement in the same row is also the truth $‘T’.$ Hence this argument is standard.

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