-- knock.i -- Library version 0.5.0 -- 0.4.1 - converted to ALANv3 SYNTAX knock_on = knock 'on' (obj) WHERE obj ISA THING ELSE "You can't knock on that!" Add To Every thing VERB knock_on DOES "You knock on" Say The obj. "." END VERB. End Add To. SYNTAX knock = knock. VERB knock DOES "You need to specify what you want to knock on." END VERB.