I read someone saying (and it may have been Mule Deer that wrote this) that one of things that always stood out about Finn Aagaard is that when someone would tell him something he would often ask "And how do you know this to be so?".

I've always appreciated the fact that when MD makes a statement in his articles he tells us why it is that way and how he reached that conclusion. I think it makes not only for better reading but also teaches the reader how to think for themselves and apply the conclusions to other similar questions.