For folks who comment before reading, the article uses "multiple invention" as follows: "In “How Common is Independent Discovery?,” Matt Clancy catalogues seve

For folks who comment before reading, the article uses "multiple invention" as follows: "In “How Common is Independent Discovery?,” Matt Clancy catalogues several attempts to estimate the frequency of multiple discovery, and tentatively comes up with a frequency of around 2-3% for simultaneous scientific discoveries, and perhaps an 8% chance that a given invention will be reinvented in the next decade" I.e. they are not talking about multiple people working together on an invention, but rather parallel discoveries.