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Yes, they can, but the OP stated that they are not. It's like asking how long does it take a car to travel from point A to point B (where distance >0) moving at 0mph, and some people say it won't ever get there, but then other people say "OMG retard you can accelerate the car and then it will get there" and then the original people sit there scratching their heads wondering where the misunderstanding is.

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I see your point, I think I just read the question as the OP intended it. A trick question of sorts. Then I missed the last couple of posts arguing about the intent of the OP.