What signs?Many signs.
I have seen the signs, such as these people get real 'edgy' (heart-rate, BP rise) and uncomfortable without their crutch - these signs AREN'T hard to spot and mankind has had a LOT of experience with alkies over the years.
There was no test for alcoholism at the time and, as far as I know, none now.Oh brother ... this isn't rocket science and simply denying it as a form of argumentation won't cut it (now or in the future).
If one has a chance (as many of the MDs and other scientists did) to examine our human 'lab rats' as closely as the astronauts - there wouldn't be MANY SECRETS AT ALL theyu could keep to themselves ...
If the alcoholic abstains what vital signs tell the monitors he's an alcoholic?
I also notice that 'alkies' have trouble learning new tasks - and get flustered easily when situations out of the norm arise ... don't you think that the rigours of the tests they subjected these guys to wouldn't 'flush out' adverse reactions at some point?
All in all I think you're making stuff up -
- or repeating old wive's tales told at AA or Al-Anon meetings ...