| Too Broad | The definition includes items which should not be included. |
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| Examples |
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(i) An apple is something which is red and round. (The planet Mars is red and round. So it is included in the definition. But obviously it is not an apple.)
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(ii) A figure is square if and only if it has four sides of equal length.
(Not only squares have four sides of equal length; trapezoids do as well.
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| Proof: |
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Identify the term being defined. Identify the conditions in the definition. Find an item which meets the condition but is obviously not an instance of the term.
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