 Exclusive and exhaustive hypotheses guard against arbitrary comparisons and ensure a more principled assessment of the evidence. The drawback is that such hypotheses cover the entire space of possibilities, and sifting through this space is cognitively unfeasible (Allen 2017). In this respect, comparing more circumscribed hypotheses is preferable. The danger of doing so, however, is that likelihood ratios heavily depend on the hypotheses that are compared. The more latitude in the choice of the hypotheses, the more variable the likelihood ratio as a measure of evidentiary value.