Apparantly Nemesis found his loophole so he could take the form of Locke and kill Jacob. Why was a loophole needed? What were the rules that prevented Nemesis killing Jacob in his form? What were the rules that required a loophole to break them?

I think until we know and understand the bigger picture of what Jacob and Nemesis were up to, what the rules actually were and who set them, it is hard to try and work out if Jacob’s actions were counteracting Nemesis’.

I know that this site is about theories and theories are based on logical guess work and assumptions but the purpose of Jacob and Nemesis is very difficult to determine at this time due to a very distinct lack of information.