Quote Originally Posted by Splitting Tens View Post
Mathematically, relying on betting systems does not work in the long run. Unless you have knowledge of the composition of a deck, you are effectively making a losing bet every time you make a wager - even with perfect basic strategy. It doesn't matter how you alter your bet each hand, you are still making wagers with a negative EV. What betting systems do accomplish is changing how you lose money - often increasing the chances of short-term winnings with increasing the risk of a whopper of a loss.. With Walter Thomason, players do lose money in the long run. You just might be the lucky one who is still ahead after a lot of play. Here is a reliable report on a computer simulation that mentions it: https://www.qfit.com/blackjack-progression-systems.htm.

No, counting cards does not guarantee winning during any particular session. However, if you can manage your bankroll and are patient, it does guarantee long term winnings. I may not be a particularly experienced player (yet), but I am a mathematician - and the numbers do not lie.
More simply put, using non count systems is the path to ruin.