> If a tool enables a team of 4 do the same things that previously was done by a team of 5, the tool replaced a worker Only if you believe that demand for work

> If a tool enables a team of 4 do the same things that previously was done by a team of 5, the tool replaced a worker Only if you believe that demand for work to be done is fixed as the cost of doing it goes down, a belief that was last reasonable to hold about three centuries ago...