For example, consider a claim by a plaintiff that his chronic myelogenous leukemia was caused by EMFs from a high-voltage powerline on his property. Even if the interaction model were known whereby exposure to powerline EMFs led to CML, it would still not be possible to conclude deductively that the plaintiff's exposure to powerline EMFs caused his cancer because other factors besides powerline EMFs can cause cancer. Only if an expert were permitted to go beyond the deductive reasoning style of physics and reason abductively, could the question be resolved on the basis of evidence and observations (as opposed to a general decisional rule that said, for example, the plaintiff cannot win because an answer from within the physics thought-style is not possible).