Your comment is correct but it doesn't contradict what you were replying to. An Algoloid language with closures and lambdas and tail-call optimization etc. can'

Your comment is correct but it doesn't contradict what you were replying to. An Algoloid language with closures and lambdas and tail-call optimization etc. can't do 100% of what a Lisp can do and maybe not even 80%, but it can still do "enough" for many definitions of "enough".