Re-duplication Theory of Speech (22.10) My con- jecture about what happens when a speaker ex- plains an idea to a listener. A difference-engine- like process tries to construct a second copy of the idea's representation inside the speakeis mind. Each mental operation used in the course of that duplication process activates a corresponding grommdr-tactic in the language-agency, and these lead to a stream of speech. This will result in com- munication to the extent that suitably matched "inverse grammar-tactics" construct, inside the lis- ter^r's mind, an equivalent representation