Let $P = (\Omega, \mathcal{F}, \mathbb{P})$ be a D1159: Probability space such that

(i)	$\text{Evidence}, \text{Hypothesis} \in \mathcal{F}$ are each an D1716: Event in $P$
(ii)	\begin{equation} \mathbb{P} (\text{Evidence}), \mathbb{P} (\text{Hypothesis}) > 0 \end{equation}

Then \begin{equation} \mathbb{P}(\text{Hypothesis} \mid \text{Evidence}) \mathbb{P}(\text{Evidence}) = \mathbb{P}(\text{Evidence} \mid \text{Hypothesis}) \mathbb{P}(\text{Hypothesis}) \end{equation}