 It is true that if a piece of evidence \(E\) fits equally well with two competing hypotheses \(H\) and \(H'\), then \(P(E\pmid H)=P(E\pmid H')\) and thus \(LR(E,H,H')\) will equal 1. But the likelihood ratio may change depending on the selection of hypotheses. Rule 401 makes clear that relevant evidence should have 