3.3 Contradictions

Some sentences have truth tables that always make them false. Such sentences are called contradictions, because they can't help but be false:

$$\begin{array}[t]{\vert c\vert c\vert\vert c\vert c\vert} \hl... ...\:F\:} & \mathrm{\:T\:} & \mathrm{\:F\:} \\ \hline \end{array}$$

Another example:

$$\begin{array}[t]{\vert c\vert c\vert c\vert\vert c\vert c\ve... ...rm{\:T\:} & \mathrm{\:F\:}&\mathrm{\:F\:}\\ \hline \end{array}$$