LOST Revisited: 6-7 “Dr. Linus”

So those touched by Jacob can be murdered by can’t commit suicide? That’s interesting. Well, Dogen and Locke were both touched by Jacob and they were killed, so it makes sense. Would that also mean that Locke wouldn’t have been able to kill himself after all? I’d like to know how Richard arrived at this conclusion. I mean, he’s had time to work it out, so I tend to believe him.