Philosophers wanted commonsense to fight skepticism. They hypostasized and destroyed it. Commonsense is skeptical--Bound by a sense of proportion and of limitation. A scarce commodity, At times supported, At times transcended by science, Commonsense has to be taken account of by the critical-Realistic theory of science. James clerk maxwell's view of today's science as tomorrow's commonsense is the point of departure. It is wonderful but overlooks the value of the sense of proportion.