[tedks]

Milgram's obedience study was tested on adult men, between ages 30-40 IIRC. There were 19 later experiments, you wouldn't call them replications because they weren't exactly the same, but they were all consistent, and they sampled diverse (for the 50's) populations.

If you didn't know that, and were assuming it was tested on undergrads exclusively, you should recognize that your assumption was wrong, and propagate that through your belief graph.