Mathematica is surely not a Lisp, as exemplified by the above. You may be able to find old commentary from Richard Fateman about that, e.g. from comp.lang.lisp

Mathematica is surely not a Lisp, as exemplified by the above. You may be able to find old commentary from Richard Fateman about that, e.g. from comp.lang.lisp, and from Kent Pitman on Wolfram's attitude to the language.