the.com/impossibility
The wall reality builds while your ambition arrives with a ladder anyway.
means A thing that cannot happen or be done, no matter the effort, cleverness, or wishing involved.
from From Latin impossibilis, simply in- (not) bolted onto possibilis (able to be done) — a flat no, etymologically.
Math flavorSome impossibilities are proven, not just unobserved — like trisecting an angle.
Degrees existLogically impossible beats merely physically impossible.
Famous quipClarke warned elderly scientists declaring things impossible are usually wrong.