100% isn't a probability, and while it's often feasible to approach it in practice, it's also often not, because the evidence necessary to reach that degree of confidence simply isn't available.

If you reach 95% confidence, you should still be wrong 5% of the time.

If the player learns that they can collect all the available evidence and be right 100% of the time in the game, and then finds that they simply can't do that in real life, they may be disillusioned with the applicability of the general techniques of the game.