I told Hajj the Arabs invented zero, because that was what I was taught 60 years ago. Of course the idea of nothing is as old as language. But an Indian mathematician invented the concept and a symbol for zero; the Arab Mathematician later used it to invent algebra. Maybe that is what I was taught, and I garbled it because I was just 12 at the time.
Which got me to thinking about other things I’d been taught. For example, that Sir Isaac Newton invented Calculus (as well as the law of gravity). Well, it’s not as cut and dried as that (Hello Leibniz), according to Miss Wikipedia. It is apparently true that, as with the telephone, the vacuum tube and the integrated circuit, when the time comes for a discovery to be made, multiple people make it at the same time.
I was going to include copious detail on the Newton-Leibniz Calculus Controversy, Alexander Graham Bell vs. Elijah Gray, (telephone), Lee Deforest and John Fleming (vacuum tube). You can look it up. This is a column, not an encyclopedia (a what?)
Often such arguments come down to invented/discovered or “made practical.”
You can take my word for it, look it all up yourself, or become disillusioned about famously self-promotional Thomas Alva Edison.