Nope. The possibility is effectively (perhaps exactly) zero.
All along all I've been arguing is that it there is no proof that the martingale with unlimited table limits and bankroll wouldn't work, and therefore Throp's statement was not disproven. All you need is a single win, which will "almost surely" happen, and you've done it. It works just fine. That win can be any number you want.
Now, some here have argued that there is an infinitesimal (but nonzero) chance of losing every hand for all eternity. I happen to disagree, (and so does QFIT, but he won't admit it!
) for reasons I've stated, but let's say that's the case.
Wouldn't that possibility apply to any system, even those with positive expectations? If the possibility exists, however tiny, of losing eternally disqualifies a system from "working", then
no system can be said to "work".