 Let \(\Cr(X \mid E)\) denote one’s credence in \(X\) on the supposition of the truth of \(E\) (whether or not one will actually receive \(E\) as new evidence); it is also called credence in \(X\) given \(E\), or credence in \(X\) conditional on \(E\). So \(\Cr(X \mid E)\) denotes a conditional credence, while \(\Cr(X)\) denotes an unconditional one. The connection between those two kinds of credences is often expressed by