It's not defined in terms of laws of physics, but it *is* defined in terms of low entropy initial conditions.
(and maybe there's some law of nature we don't fully understand yet that requires such initial conditions)
Discussion
Using /delta S > 0 as a definition of the direction of time is like saying AI can't replace humans because we have real creativity 🤣
If it wasn't for entropy allowing us to remember the past, and for evolution to work, what use would the arrow of time concept even have?
If an arrow of time hits a tree in a forest, is the AI industry no longer a scam?