Answer
$\text{false}$
Work Step by Step
Substituting in the values: $\sim[(\sim\text{true}\lor\text{false})\rightarrow(\text{false}\land\text{false})]\equiv\\\sim[(\text{false}\lor\text{false})\rightarrow(\text{false}\land\text{false})]\equiv\\\sim[(\text{false})\rightarrow\text{false})\equiv\sim\text{true}\equiv\text{false}$
