"Lisp" isn't a single language. Arguably the language people speak about when they say Lisp without qualifier, ANSI CL, allows conforming implementations (e.g. SBCL) to offer gradual typing, not just heuristics.
"Lisp" isn't a single language. Arguably the language people speak about when they say Lisp without qualifier, ANSI CL, allows conforming implementations (e.g. SBCL) to offer gradual typing, not just heuristics.