$$\begin{matrix*} & \mathbf{Tool} \\
\mathbf{Reality} & \begin{matrix*}[l | c | c]
& Correct & Incorrect \\
\hline
Correct & true \ negative & false \ positive \\
\hline
Incorrect & false \ nagetive & true \ positive \\
\end{matrix*} \ \end{matrix*}$$
- A complete tool never reports a false positive.
- A Sound Tool never reports a false negative.