The trouble is the interaction between juries, the adverserial system and expert witnesses. In general, I am in favour of the former two. But the fact is that

The trouble is the interaction between juries, the adverserial system and expert witnesses. In general, I am in favour of the former two. But the fact is that you can get a "expert" to say anything you like. I expect this can be bad enough in a Civil Law court, because even educated judges can be bamboozled. It's worse in the Common Law system, because it provides a platform where made-for-the-event, fruadulent expertise gets the same platform as its opponent.