Difference between revisions of "Valid argument"
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| − | A '''valid argument''', in [[formal logic]], one in which the conclusion is correctly derived from the premises. That is, a valid argument is one in which, if the premises are true, the conclusion must also be true. | + | A '''valid argument''', in [[formal logic]], one in which the conclusion is correctly derived from the premises. That is, a valid argument is one in which, if the premises are true, the conclusion must also be true. A valid argument whose premises are true is called a '''sound argument''', and its conclusion must be true. A valid argument whose premises are not all true is called a '''valid but unsound argument''', and its conclusion is not necessarily true. |
{{quotebox|A deductive argument is said to be valid when the inference from premises to conclusion is perfect. [http://www.philosophypages.com/lg/e01.htm Arguments and Inference: truth and validity] }} | {{quotebox|A deductive argument is said to be valid when the inference from premises to conclusion is perfect. [http://www.philosophypages.com/lg/e01.htm Arguments and Inference: truth and validity] }} | ||
[[Category:Logic]] | [[Category:Logic]] | ||
Revision as of 16:23, November 2, 2017
A valid argument, in formal logic, one in which the conclusion is correctly derived from the premises. That is, a valid argument is one in which, if the premises are true, the conclusion must also be true. A valid argument whose premises are true is called a sound argument, and its conclusion must be true. A valid argument whose premises are not all true is called a valid but unsound argument, and its conclusion is not necessarily true.
A deductive argument is said to be valid when the inference from premises to conclusion is perfect. Arguments and Inference: truth and validity