Clojure is a different language - it borrows stuff from Lisp, but it can't run any non-trivial Lisp code from the past decades without more or less rewriting it

Clojure is a different language - it borrows stuff from Lisp, but it can't run any non-trivial Lisp code from the past decades without more or less rewriting it. Even primitive stuff like math operators work differently - because Clojure mostly uses the math stack of the host language.