  Some authors, such as Bostock, Crombie, McDowell, and White, think that Plato himself is puzzled by this puzzle. Thus Crombie 1963: 111 thinks that Plato advances the claim that any knowledge at all of an object O is sufficient for infallibility about O because he fails to see the difference between “being acquainted with X” and “being familiar with X.” But to confuse knowing everything about X with knowing enough about X to use the name ‘X’ is really a very simple mistake. Plato would not be much of a philosopher if he made this mistake.