Is learning how to read an analogue clock really an effective use of one's time? I myself was taught how an am able to read an analogue clock, but I doubt that I would be much worse off without that abulity.
For knowledge you only use occasionally and always in a context where reference (conventional or AI) is available, why not? That frees up memory/resources to learn more important stuff, the stuff where consulting reference might be too slow or not available.
Do you know how to use a fountain pen? Do you know how to tell your position by the stars? Do you know how to start a fire with sticks and stones? Life's too short to spend it hoarding trivia.
