I get what your intentions are, I just don't think it's realistic to expect black and white results like you seem to want. That may be fine when you can clearly define the parameters and understand all the interactions various factors have on one another but a lot of what we do from day to day just isn't like that, we rely a lot on intuition and the subconscious processing of the brain that we likely can't fully comprehend.

For me personally, I don't feel the need to absolutely quantify every conclusion I make because it would make life unlivable--a caveat to that is that I'm prepared to be wrong about things.

A fairly common trait amongst the people that frequent forums like this one are that they don't profess to be absolutely correct about all their conclusions but if they have a significant confidence in something, they will push back if they discern some apparent foul-play.