Ah, right. And apparently this was a prime motivation to for the first Lispy closures implementation, which was called... Scheme. https://en.wikisource.org/wiki

Ah, right. And apparently this was a prime motivation to for the first Lispy closures implementation, which was called... Scheme. https://en.wikisource.org/wiki/Scheme:_An_Interpreter_for_Extended_Lambda_Calculus https://en.wikisource.org/wiki/Scheme:_An_Interpreter_for_Ex... "we have implemented an interpreter for a LISP-like language, SCHEME, based on the lambda calculus [Church]"