Fallacies of definition
Ways in which a term may be poorly defined / From Wikipedia, the free encyclopedia
Fallacies of definition are the various ways in which definitions can fail to explain terms. The phrase is used to suggest an analogy with an informal fallacy.[1] Definitions may fail to have merit, because they are overly broad,[2][3][4] overly narrow,[3][4] or incomprehensible;[4] or they use obscure or ambiguous language,[2] contain mutually exclusive parts,[3] or (perhaps most commonly[5]) are circular.[2][6]