On Sat, May 11, 2019 at 03:45:09AM +0200, Emanuel Berg wrote:
> When do you think the very first person thought
> of a Lisp syntax with a REPL, and had it
> execute stuff, in his brain or maybe with wood
> and other items he assembled in his cave
> or hut?

Why speculate, when the "very first person(s)" write about it?

  http://jmc.stanford.edu/articles/lisp/lisp.pdf

Enjoy
-- t