Yes. Of course, they should do it properly and not stop at that but look at all plausible factors. For example, there's a very common chromosomal abberration th

Yes. Of course, they should do it properly and not stop at that but look at all plausible factors. For example, there's a very common chromosomal abberration that leads to a ten-fold increase in the violent crime rate (or more), yet this is hardly discussed at all.