EXERCISE

$1\mathrm{.}2\mathrm{.}8$: Finding truth values to make two logical expressions evaluate to different values.

Give truth values for the propositional variables that cause the two expressions to have different truth values.

For example, given $pvvq$ and $po+q,$ the correct answer would be $p=q=T,$ because when $p$ and $q$ are both true, $pvvq$ is true but $po+q$ is false. Note that there may be more than one correct answer

$($a$)r^{{?}^{?}}(pvvq)$

$(r^{{?}^{?}}p)vvq$

$($b$)not{p}^{{?}^{?}}q$

not$(p^{{?}^{?}}q)$

$($c$)pvvq$

$(not{p}^{{?}^{?}}q)vv(p^{{?}^{?}}$notq$)$

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$1\mathrm{.}2\mathrm{.}9$: Boolean expression to express a condition on the input variables