Difference between revisions of "Universal negative"
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In [[logic]], a '''universal negative''' is a proposition of the form “No S is P.” Symbol: E, e.<ref>[http://dictionary.reference.com/browse/universal+negative Universal negative]</ref> | In [[logic]], a '''universal negative''' is a proposition of the form “No S is P.” Symbol: E, e.<ref>[http://dictionary.reference.com/browse/universal+negative Universal negative]</ref> | ||
| − | An example of a valid universal negative is "No triangles have | + | An example of a valid universal negative is "No triangles have four sides". This is a valid universal negative because if something does not have three sides, it cannot be a triangle.<ref>[http://blog.faithbeyondbelief.ca/2014/08/the-universal-negative-can-it-be-proven.html A universal negative: Can it be proven?]</ref> |
== External links == | == External links == | ||