Full Idea
Most neurons, it has been said, are pretty much alike and largely interchangeable.
Gist of Idea
Neurons seem to be very similar and interchangeable
Source
Jaegwon Kim (Philosophy of Mind [1996], p. 76)
Book Reference
Kim,Jaegwon: 'Philosophy of Mind' [Westview 1998], p.76
A Reaction
This fact, if true, is highly significant, because the correct theory of the mind must therefore be some sort of functionalism. If what a neuron is is insignificant, then what it does must be what matters.