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" A standard household mousetrap has about five parts , all of which must be present for the trap to work . This ' mosaic novel ' is in 5 parts , each written by a different author . The site needs updating in parts , but links to classroom resources and discussion . Finally the circulation connects all the parts , in particular those which appear in a new form ( the achievement of the traditional cloister form is rendered impossible here by the slope of the terrain ) . An analogy with more mundane things than sets would be that if one takes a piece of food and subdivides it into parts , one has something one can still eat ( e.g .