You don't need to be a race car driver to debunk a sales man trying to tell you "This is the best car in the world!".
My advice to you is to be humble, you're clearly passionate about Lisp and turn that into a positive thing. Saying Lisp is the best language in the world is a sweeping statement, something a snake oil salesman would put across.
My advice to you is to be humble, you're clearly passionate about Lisp and turn that into a positive thing. Saying Lisp is the best language in the world is a sweeping statement, something a snake oil salesman would put across.