Isn't that when people always start talking about entropy and how that gives us an arrow of time?

And I think whether math "works" within an incomplete model isn't really proof. I mean I can calculate a negative amount of people on the bus... But that alone doesn't make it possible/real.

It still can't be rigorously proven that thermodynamics works - if you look at the statistical mechanics papers on it they basically assume something is random that is not to do it. TBF, the empirical evidence is convincing, and the assumptions they do make are small, even infinitely small.

The second law probably relates to pseudorandomness and P=NP, in the end, but that's a big unsolved problem.

Goddamn, every time I watch this the project manager in particular gets more annoying.

That being said, I can imagine the other side, where "red line with transparent ink" becomes "dumb terminal with local processing capabilities" or something. Bitch, they don't know the jargon, but I'm sure you can tell what they want.

Shit. Fixed.

Soo what are you wondering? I'd expect it's obvious in our everyday experience that time is a bit different from space.

If you want a something more mathematical, pick an equation from physics. It probably treats time separately from space. The only kind-of exception I can think of is general relativity, and even it ends up producing metrics that give time the opposite sign, like the flat space example the other poster mentioned.

The directionality of time is a bit more subtle and emergent. But, you don't need it to look at a double light cone, which just follows from Maxwell's equations or the other wave equations in nature, and observe that while a constant-time slice of it is a sphere, the whole thing is not a hypersphere.

If somebody here knows their way around QFT they might have something to add, but for all the rest of science it's just kind of built in.