If a capital letter, ex$."$A$"$ appears in a truth$-$table, and if the original values of "true$-$false$-$true$-$false" are listed vertically beneath it$,$ then if A appears again $($once or more$/"$other times$/$instances in the same argument$),$ then... it is important to keep changing its$/($A$\text{'}$s$)$ original values to any new set of values: ex$.$ true$-$truefalse$-$true, or false$-$false$-$false$-$true, and so forth.

True

False