In Saw (2004) Dr Gordon and Adam were locked up in a room together. Dr Gordon, as we find out, is supposed to kill Adam in order to prevent his family from getting killed.
Adam, however, is never really given a chance to escape. At the end, Jigsaw says to Adam, "The key to that chain is in that tub". If we recall what Jigsaw really does, he gives people the chance to live by ironically escaping their situation, so why doesn't Adam have a chance to escape?
If we consider that Jigsaw is not a "murderer", as mentioned in the movie, then why does he allow two "innocent" people to die? We have Adam and Amanda's "dead cell mate" which were very much both alive. why did they die unnecessarily without a chance to live?
Dr Gordon was told more than once to kill Adam and even given a hint with the cigarette and the blood, but Adam was never given a chance to live, so what was his crime? We hear that Jigsaw calls Adam a voyeur, but is that not exactly what Jigsaw is himself, a voyeur?
I suppose the question is, why the ambiguous exceptions to the MO of jigsaw with Adam and Amanda's "dead cell mate"?