They tried making me and a generation of medical students learn decision trees like this for medicine and psychiatry about 35 years ago.
That is why we still have sick and mad patients in 2016.
It does not work in "real life" but it's a good chart to shove in front of complete beginners to deter them from serious watches for Life!
I don't even ask myself 90% of those questions when I buy a watch.
Veni. Vidi. Emi. (I came. I saw. I bought.)
Regards,
MTF