Agree with you on this. The point I was making was that the study doesn’t prove that people are inherently evil when given access to power. Can see how my phrasing sounded absolute and appreciate the clarification. 

 BBC replicated the experiment in 2002 and found that group dynamics and leadership were major factors in influencing the guard’s treatment toward prisoners, I.e. void of leadership - the guards were not motivated to participate in violence or abuse toward the prisoners. It’s covered in the doc and easily found online. That’s why I used that specific language when responding to what conclusions could still be derived from the study. However, given the obvious flaws in the design of the study - I’m in agreement that we should default to not knowing.