This is dubious, given that Common Lisp was the first standardized object-oriented language. See the Common Lisp Object System. Whatever you have used, it can'

This is dubious, given that Common Lisp was the first standardized object-oriented language. See the Common Lisp Object System. Whatever you have used, it can't be Common Lisp, since Common Lisp is a multi-paradigm language with imperative, object-oriented and functional elements blended together. Consider this code snippet: (defparameter *persons* '((john 15) (maria 12) (agnes 20))) (defparameter *number-of-persons* 0) (defun count-persons (persons) (dolist (person persons) (incf *number-of-persons*)) (format t "~%The number of persons is ~a." *number-of-persons*)) What do we see: * mutable variables * procedures with side effects * imperative loop with DOTIMES * imperative setting of varibles * sequences of imperative statements Doesn't look like one is limited to 'functional style' in Common Lisp...