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Wff'n Proof: The Game of Modern Logic, by Layman E. Allen
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This set of 21 games taught principles of modern logic. Players learned to combine grammatically correct logical statements called well-formed formulae (WFFs) into logical proofs. WFF 'N Proof was developed by Layman E. Allan of Yale University Law School under a grant from the Carnegie Corporation for ALL (Accelerated Learning of Logic). Allen applied for a trademark for WFF 'N Proof in August 1961; it was registered the following year but has now expired. The game sold from 1962. The set includes 18 wooden cubes with small letters, representing sentences, and 18 with large letters, representing logical rules of inference. The simplest of the games in WFF 'N Proof were designed to teach young children how to arrange these cubes on a series of paper mats to form WFFs. The remaining games were meant to teach how to argue logically. These games involve assuming the truth of WFFs of certain forms and concluding the truth of WFFs of other forms using logical rules of inference. Thus players proved theorems but did not use that terminology. The most advanced of these games were designed to challenge college students. The set also includes a timer, a book of instructions written by Allen, WFF 'N Proof: The Game of Modern Logic (New Haven: Autotelic Instructional Materials Publishers, 1970), and a leaflet describing "Games for Thinkers" from WFF 'N PROOF Publishers of Turtle Creek, Pennsylvania. All these materials are stored in a plastic case that is marked on the cover: WFF'N PROOF (/) The Game of Modern Logic.
- Sales Rank: #6183009 in Books
- Published on: 1968
- Binding: Paperback
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