I think the article should more clearly state that (5x/4) is expected amount of "taking other envelope". The expected amount of the whole game has not changed, no matter you swap/not-swap the envelope, but the paradox happens during the moment you consider switching (taking other envelope).
I think the article should more clearly state that (5x/4) is expected amount of "taking other envelope". The expected amount of the whole game has not changed, no matter you swap/not-swap the envelope, but the paradox happens during the moment you consider switching (taking other envelope).