In the first section of his short story "The Lottery in Babylon", Borges writes:
I have known that thing the Greeks knew not -- uncertainty.
As far as I know, there was nothing specific that Babylonians knew about randomness, chance, or probability of which ancient Greeks were not aware. This got me wondering if this statement refers to any specific fact from Greek/Babylonian history, philosophy, or something else - or if it was just thrown in as a stylistic element such as when the narrator says that they don't have much time as their ship is set to sail out soon later in the story.