I think they are poor because there are so manny factors involved that it's difficult to create a reliable model. But I don't know, so this is my opinion. Compu

I think they are poor because there are so manny factors involved that it's difficult to create a reliable model. But I don't know, so this is my opinion. Computers could probably help test simple hypotheses but I don't think they could be used as evidence to begin human trials.