The forensic two-trace problem is a perplexing inference problemintroduced by Evett (J Forensic Sci Soc 27:375–381, 1987). Different possible ways of wording the competing pair of propositions (i.e., one proposition advanced by the prosecution and one proposition advanced by the defence) led to different quantifications of the value of the evidence (Meester and Sjerps in Biometrics 59:727–732, 2003). Here, we re-examine this scenario with the aim of clarifying theinterrelationships that exist between the different solutions, and in this way, produce a global vision of the problem. We propose to investigate the different expressions for evaluating the value of the evidence by using a graphical approach, i.e. Bayesian networks, to model the rationale behind each of the proposed solutions and theassumptions made on the unknown parameters in this problem.
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机译：法医的两迹问题是由埃维特（Evett）提出的一个令人困惑的推理问题（J Forensic Sci Soc 27：375-381，1987）。用不同的可能方式来表达一对竞争命题（即，一个由起诉提出的主张和一个由辩护提出的主张）导致证据价值的量化不同（Meester和Sjerps in Biometrics 59：727-732，2003） ）。在这里，我们重新检查这种情况，以弄清楚不同解决方案之间存在的相互关系，并以此方式对问题产生全局认识。我们建议通过使用图形方法（即贝叶斯网络）来调查用于评估证据价值的不同表达式，以对每种提出的解决方案的原理以及对该问题中未知参数的假设进行建模。
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