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Jack Kilby described his invention of the Integrated Circuit as the result of being on a team that wasn't good at anything besides making silicon wafers. So he figured out how to put capacitors and resistors on a silicon wafer alongside the transistors.
At YC we invented funding in batches because we didn't know how to be investors and wanted to learn fast. At Viaweb we invented the web app because we didn't know how to write client (= Windows then) software.
