MC Carthy, when creating Lisp, decided on an abstract syntax that is fine and dandy for people doing program rewriting but never provided a human palatable concrete syntax.
McCarthy defined both S-expressions for symbolic manipulation and M-expressions for publication.
Note also that the distinction between concrete and abstract syntax parallels the distinction made by Chomsky between surface and deep structures.
I don't see that it does.
But some will claim that Chomsky is a fraud in linguistic.
Anyone making such a claim is a fraud.
This has nothing to do with his political opinions :)
For the most part, Chomsky quotes from public documents
and draws obvious inferences. Quite in contrast to
McCarthy, who is a standard-issue jingoist who indeed
has nothing but uninformed opinion when it comes to politics.
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