GTO Poker Theories - Defensive Pessmism
If you assume that a big downswing is coming, you will be much better prepared than the rose tinted optimists in poker.
One of the real gifts poker has given me is that it has been a great jumping-off point to learn things from other disciplines like economics, AI, psychology, and Game Theory. So here is a series of articles where I bring some of the most interesting things I have learned from other subjects outside of poker which are applicable to this game we know and love.
Defensive pessimism is a psychological strategy where individuals manage anxiety by setting low expectations and mentally preparing for potential obstacles. Far from being a sign of defeatism, this approach can be a powerful tool for success, especially for those who are naturally anxious or prone to overthinking.
Coined by psychologist Julie Norem, defensive pessimism involves envisioning worst-case scenarios in order to create concrete plans to deal with them. This mental rehearsal helps reduce uncertainty, increase control, and improve performance. For example, a student might imagine failing an exam, then study diligently to prevent that outcome. The fear fuels preparation, not paralysis.
While this mindset can seem counterintuitive in a culture that champions optimism and self-belief, research shows that defensive pessimists often perform just as well as—or better than—more optimistic peers. It works not because they expect to fail, but because they use their anxiety productively.
Hope for the best, prepare for the worst
It may sound like a horrible way to go about one's life, but I think a little defensive pessimism is a useful thing for a poker player.
If you have been around the game long enough, you know that downswings are inevitable and can be brutal. You have to assume a downswing is coming, and you can be pleasantly surprised when it does not.
Being prepared for them is much better than pretending they won't happen. I saw a tweet last week from Chance Kornuth that summed this up, indirectly:
The most dangerous time in a poker player's career isn't when they're losing.
It's right after their first big win.
— Chance Kornuth (@ChancesCards) June 1, 2025
When some players have only known winning, which is most players at the start of poker, then suddenly losing a lot, can feel like a tremendous rug pull. This doesn't mean you cannot hope for the best, it just means it is also helpful to prepare for the worst.
Poker is the only game where the best in the world still have more losing days than winning days. Prepare accordingly.
What theories from outside of poker have helped your game? Let us know in the comments.
