a) Trying to understand historical events with many variables via deliberate scientific experimentation is a reasonable thing to do.

b) The Stanford Prison Experiment has always been under a ton of scrutiny, and is a good example of flashy events heavily covered in intro psych courses that are viewed with a lot more skepticism in the professional community (so I have read, anyway).

c) More info recently came out about it recently, actually: https://cosmosmagazine.com/social-sciences/new-evidence-show...

d) Repetition of scientific findings is one of the main pillars of science. See: https://en.wikipedia.org/wiki/Replication_crisis