Years ago we played a Scrabble game on an old computer. The computer always won and, wondering why, we found the source code and studied it. In the program we found a rule that said if the computer’s word scored fewer points than the human’s, the computer would secretly swap out its tiles until it could beat the human.
The computer cheated.
The company I work for makes a 100% deterministic operating system. You want that when the computer is flying the airplane. (Have you traveled on a 787?)
Some of the slot machines in casinos also use our software and because the computer is 100% deterministic, it is guaranteed that, over time, they are going to take all your money.
You can bet your life on it.