 But relying on exclusive and exhaustive hypotheses is not without complications either. Consider an expert who decides to formulate the defense hypothesis by negating the prosecution hypothesis, say, “the defendant did not hit the victim in the head”. This choice of defense hypothesis can be unhelpful in assessing the evidence. What is the probability that the suspect would carry such and such blood stain if he did not hit the victim in the head? This depends on whether he was present at the scene, what he was doing at the time and many other circumstances. As Evett, Jackson, and Lambert (2000) point out, the choice of a particular hypothesis to be used in the evaluation of the strength of the evidence will depend on contextual factors. More often than not, the hypotheses chosen will not be mutually exclusive. Comparing exclusive and exhaustive hypotheses can also be unhelpful for jurors or judges making a decision at trial. In a paternity case, for example, the expert should not compare the hypotheses “The accused is the father of the child” and its negation, but rather, “The accused is the father of the child” and “The father of the child is a man unrelated to the putative father” (Biedermann et al. 2014). Even though the relatives of the accused are potential fathers, considering such a far-fetched possibility would make the assessment of the evidence more difficult than needed (Evett et al. 2000).