Deﬁning cluttering: the lowest common denominator
The root of the word ‘deﬁnition’ is the Latin ‘deﬁnire’, which means ‘set limits to’. This chapter seeks to do that with the communication disorder called cluttering from a ‘lowest common denominator’ perspective. In mathematics, the lowest common denominator (LCD) is the smallest number that can be divided into the denominators of two or more fractions that are to be added or subtracted. One of its ﬁgurative meanings is the broadest and most widely applicable requirements for a given problem or issue. Another way to con sider an LCD deﬁnition is to determine the minimum number of necessary and suﬃcient conditions in order that the problem or issue is de-limited or deﬁned.