he attacked the ability of dr. vass to scientifically identify the smell of death. >> his opinion was, "you just have to trust me." and i don't think that that's acceptable for a courtroom. but you're willing to come to this jury... unless you can clearly show that a prosecution is presenting evidence that is faulty, you're running into a danger zone. let's say, for example, the prosecution presents one witness that says something, and they're relying on an expert, and the defense puts their own expert to explain that it's junk science. who are you going to believe? >> i think it's a little bit naïve to think that the adversarial system will have smart lawyers on both sides, and they'll duke it out, and we'll figure out the right answer. we need the science first, and then let them fight about what the good science means, as opposed to struggling with disciplines that don't have good science undergirding them. >> lawyers are scientifically illiterate, judges are scientifically illiterate, and certainly juries are. so th