I suppose something like SCIP doesn't place as much emphasis on mutation, but when I think of LISP the last thing I think of is immutability. Obviously Clojure

I suppose something like SCIP doesn't place as much emphasis on mutation, but when I think of LISP the last thing I think of is immutability. Obviously Clojure pushes against that a little, but still, what is LISP without a slowly accumulated mudball of small state changes? That's what the magic is!