i have totally run into stuff that silently truncates the password i give it. It’s always something like online banking that you would hope has robust enough security standards to hash that shit, too… The one in particular i’m thinking of silently truncated the password in the reset-password form, but not for the log-in form. Took me forever to figure out wtf was going on there.
We actually kinda do perceive a fourth dimension: time. Sure, we infer it from our memories and come up with cause and effect relationships to help us understand it. But we do know it’s there.