Overly Broad or Narrow Definitions
A definition is no good if it defines its subject with overly wide or narrow parameters. For example, "a shape with four sides of equal length" is not a good definition for 'square'. Why? Not only squares have four sides of equal length; rhombi do as well. This is proven by identifying not only the term being defined, but also the conditions in the definition. Likewise, defining a 'rectangle' as "a shape with four perpendicular sides of equal length" is not valid because it is too narrow.
Read more about this topic: Fallacies Of Definition
Famous quotes containing the words overly, broad, narrow and/or definitions:
“Total physical and mental inertia are highly agreeable, much more so than we allow ourselves to imagine. A beach not only permits such inertia but enforces it, thus neatly eliminating all problems of guilt. It is now the only place in our overly active world that does.”
—John Kenneth Galbraith (b. 1908)
“How does Nature deify us with a few and cheap elements! Give me health and a day, and I will make the pomp of emperors ridiculous. The dawn is my Assyria; the sun-set and moon-rise my Paphos, and unimaginable realms of faerie; broad noon shall be my England of the senses and the understanding; the night shall be my Germany of mystic philosophy and dreams.”
—Ralph Waldo Emerson (1803–1882)
“Nuns fret not at their convent’s narrow room;”
—William Wordsworth (1770–1850)
“What I do not like about our definitions of genius is that there is in them nothing of the day of judgment, nothing of resounding through eternity and nothing of the footsteps of the Almighty.”
—G.C. (Georg Christoph)