Abstract

A special road sign bearing the legend of the title greeted visitors to the Stanford Artificial Intelligence Laboratory during the time it was housed in the starship that parked on a Stanford hill from the mid sixties to the mid eighties. The sign, near the periphery of SAIL's grounds, referred to the Stanford Cart, a guerrilla research project near the periphery of John McCarthy 's core interests, but motivated by his desire for autonomous vision-guided automatic cars. In a 1969 essay \cite{JMC69} {\em Computer Controlled Cars}, John suggested that the power of a PDP-10 was adequate for the job. I think John still favors this estimate. John is guided by a strong and principled intuition that has proven itself correct in very many things. But in this paper I will present accumulating experimental evidence that hints that in this one opinion John's intuition misled him by more than a few orders of magnitude