Is there ANYbody today whose knowledge is all their “own”? How many people really learn something completely on their own? Even tools count as the sum of some

Is there ANYbody today whose knowledge is all their “own”? How many people really learn something completely on their own? Even tools count as the sum of somebody else’s knowledge, like the computer and language you use even if you teach yourself how to program. Everyone builds upon the knowledge of billions who came before. It’s not a competition.