  According to evidence proportionism, a subject's level of confidence in H should vary directly with the strength of her evidence in favor of H's truth.  Likewise, her level of confidence in H conditional on E should vary directly with the strength of her evidence for H's truth when this evidence is augmented by the supposition of E.  It is a matter of some delicacy to say precisely what constitutes a person's  evidence,[10]  and to explain how her beliefs should be "proportioned" to it. Nevertheless, the idea that incremental evidence is reflected in disparities between conditional and unconditional probabilities only makes sense if differences in subjective probability mirror differences in total evidence.