Comment by dang

2 days ago

...booleans, conditional expressions, first-class functions, lambdas, closures, eval...

Booleans? I think some guy named Boole might have prior art...

(Yeah, OK, he didn't have a programming language...)

  • booleans as values of course.

    arguably redundant since GP did say symbolic communication, but Lisp had T before Algol 60 came out