Blue Lacuna — 51 of 467

Section - Knocking

Knocking is an action applying to one visible thing. Understand "knock [something]" or "knock on [something]" as knocking. Carry out knocking: say "Nothing happens." Vague knocking is an action applying to nothing. Understand "knock" as vague knocking. Carry out vague knocking: speak as the parser "You'll have to specify what you want to knock."