Notes on Jaynes Probability Theory
$$
\begin{array}{c}
\text{if } A \text{ is true, then } B \text{ is true} \\
A \text{ is true} \\
\hline
\text{therefore, } B \text{ is true}, \quad \colorbox{#ffff88}{(1.1)}
\end{array}
$$
$$ \begin{array}{c} \text{if } A \text{ is true, then } B \text{ is true} \\ B \text{ is false} \\ \hline \text{therefore, } A \text{ is false.} \quad \colorbox{#ffff88}{(1.2)} \end{array} $$
$$ \begin{array}{c} \text{if } A \text{ is true, then } B \text{ is true} \\ B \text{ is false} \\ \hline \text{therefore, } A \text{ is false.} \quad \colorbox{#ffff88}{(1.2)} \end{array} $$