Not just that, he also seems to think that he invented Lisp's idea of code-as-data: "In most languages there’s a sharp distinction between programs, and data, and the output of programs. Not so in the Wolfram Language. It’s all completely fluid. Data becomes algorithmic. Algorithms become data. There’s no distinction needed between code and data." ( http://blog.wolfram.com/2013/11/13/something-very-big-is-com... )

Kinda funny considering how the Mathematica language is built on top of the M-expressions that lisp never bothered to implement.