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Did you hang out with those people during civilian life? How can you say the various credos had no effect on them if you do not have the same experience without the credos.

I was clearly speaking from my personal experiences and perceptions, which are obviously not intended to be considered the equivalent of a formal scientific study.

But since you asked, why would one have to have experience with that exact group of people prior to coming to a conclusion? I agree that it would be ideal if that was the case, but there are many studies considered to be scientifically valid that use one group of people who come from similar circumstances as a control, while only testing on another group. In my example I suppose the control would have been the people I know from outside the military. As I stated though, my comment was just an anecdote from my personal experiences, not a peer-reviewed, published article intended to expose the author of the other study as a fraud.

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