No, who said anything about always?
I gave a vague reasoning for why among two sets of thousands of people each, over a timespan of a thousand years, who are subjected to similar problems and similar climate changes, there may be one or more in each set of people who come up with similar ideas.
Is that wrong now or not? Does every human invention have to spread from one single human to all others or is it possible that a german and an englishman invented the jet engine independently from one another?
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