[Davidzheng]

I don't really understand gpt5's reasoning? does its soln not cross the equator ever? b/c if you cross you always have to do it in daylight so it's kind of strange to say that no? or it means you have to cross it on boundary of daylight or something

[Davidzheng]

oh like its solution is to stay in one hemisphere and just go in a circle following the day-night cycle i guess. but I don't see its reasoning as that rigorous that crossing must need this westward speed but probably i'm being dumb

[Davidzheng]

I guess one has to check that if you are spinning around at 23.5-epsilon angle and then do the dash down the 23.5-epsilon angle in one day from the other side you cannot beat your speed of staying in one hemisphere. you could dash straight down in 12-hour timeframe and it'll need like 343 m/s or 1233 km/h which is much too high. and diagonally probably doesn't help too much? But I think it means at some tilt angle it's worth doing this? does GPT5-pro know this angle?