GOD DOES NOT PLAY DICE

So what does this have to do with Einstein's phrase "God doesn't play dice"?

Einstein thought that if there was a speed exceeding the speed of light, it would be impossible. If the impossibility turns out to be not impossible, then according to Einstein the law becomes uncertain like playing dice.

It's like one insistent (Einstein), the other is also adamant. For Einstein, his insistence is a sign of truth, and other rebuttals were considered by Einstein as things that refute the certainty of natural laws, which means that natural laws are uncertain - impossible. That's what Einstein meant.