I was putting up some wall decorations earlier today and was painstakingly realigning everything until it looked level to my eyes. It might be just a hair off, but if I don’t correct it, I’ll see the misalignment almost instantly and get bothered for the rest of time until I fix it. Has anyone investigated, or is there literature on the minimum perceptible angle from level to the naked eye?
Yeah- Square and level are two different things. I can get a cube and rotate it any way, opposite faces will still be square to each other (technically parallel) despite not being level.
Interestingly, two perfectly vertical walls cannot be square to each other.
What do you mean re: the walls?
The Earth is curved.
At least, I assume that’s what they meant.
Oh, you’re one of those round-Earth nutjobs?
Ha! No, what whackjobs those people are. No, clearly the Earth is donut-shaped. This is obvious, because the Bible says so. The lizard people are suppressing the information, except on the internet. And talk radio. And tabloids.
Donut shaped!