"I will take for granted the fact that Lisp is commonly acknowledge to be a FP language, so I will not explain why Lisp is a FP language." Oi. Time to figure out where this is commonly acknowledged (and why Rich Hickey didn't think it was all that common when he made #clojure an FP lispy). https://tilde.town/%7Eramin_hal9001/articles/emacs-unix-04_lisp-does-fp-better-than-bash.html
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@worldsendless Sure, Common Lisp isn't as purely functional as something like Haskell, but programming languages textbooks pretty much universally classify the Lisp family as functional.
@peterdrake I need to read me more PL text books!