Reply #7: More likely physical

[Coastie for Truth]

Excess "body mass index"
Diabetes
High blood pressure
Etc.

Back during conscription, if you went to a good internist at a good group, they could go through the DOD Medical Regs and get you a "4F" (absolutely physically unqualified) or a "1Y" (only qualified for limited duty or only qualified in the event a real emergency).

My doc explained "1Y" as being prospective - that is, did you have clinically detectable "insulin resistance" that could blossom into Type II diabetes 20 years from now if it went untreated, or a trick knee that could develop into disabling arthritis in 20 years if left untreated, or early childhood asthma - now asymptomatic - but with some lesions - that could develop into emphysema in 20 years. The other side of "1Y" - if you had 20/400 astigmatism corrected to 20/40 -- but you had a PhD.

Lots of guys got 1Y's - if they had a good diagnostician.

Added on edit - My guess is that in a typical high school graduating class, a large fraction of the kids have clinically detectable "insulin resistance" that could blossom into Type II diabetes 20 years from now if it went untreated - and if they don't exercise, slim down, and watch their diet.