Memory Game Lesson 1 VocabOnline version Review for your lesson 1 vocab retake quiz by Chelsea Senopole the signature of a famous person not thinking clearly; not able to use reason or good judgment. irregular a shiny, black substance that is used in pencils. nonexistent a part of a piece of writing that deals with one subject, begins on a new line, and is made up of one or more sentences. pictures or words painted or drawn on a wall, building, etc. irrelevant irrational not important or relating to what is being discussed right now. an outdated system of sending messages over long distances by using wires and electrical signals. paragraph graffiti telegraph nonverbal not normal or usual; not following the usual rules about what should be done; not regular in form or shape. not involving or using words; not able to speak. autograph graphite not present or real; not existing.