Valid argument - Revision history

DavidE: example

2019-09-12T20:57:50Z

example

DavidE: sound argument; valid but unsound argument

2017-11-02T16:23:36Z

sound argument; valid but unsound argument

DavidE: alternative definition

2016-06-17T00:05:50Z

alternative definition

DanH: category

2008-03-19T21:08:30Z

Ed Poor: source name

2008-03-19T19:04:37Z

source name

Ed Poor: fix link

2008-03-19T19:03:16Z

fix link

Ed Poor: the conclusion is correctly derived from the premises

2008-03-19T19:01:32Z

the conclusion is correctly derived from the premises

New page

A '''valid argument''', in [[formal logic]], one in which the conclusion is correctly derived from the premises.

{{quotebox|A deductive argument is said to be valid when the inference from premises to conclusion is perfect. [http://www.google.com/url?sa=t&ct=res&cd=4&url=http%3A%2F%2Fwww.philosophypages.com%2Flg%2Fe01.htm&ei=bmLhR-jcEpyEygSC_KHZCQ&usg=AFQjCNGAdQx_uQsww5UmvYyOy8eUkMkrGA&sig2=t_MZ8Dqpj6mfQWYpq_aYjA]}}

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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 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 '''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.
 {{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]]

@@ Line 1: / Line 1: @@
-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] }}
 [[Category:Logic]]

@@ Line 1: / Line 1: @@
-A '''valid argument''', in [[formal logic]], one in which the conclusion is correctly derived from the premises.
+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.
 {{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]]

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	{{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]]

← Older revision		Revision as of 19:04, March 19, 2008
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	A '''valid argument''', in [[formal logic]], one in which the conclusion is correctly derived from the premises.		A '''valid argument''', in [[formal logic]], one in which the conclusion is correctly derived from the premises.

−	{{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] }}	+	{{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] }}

← Older revision		Revision as of 19:03, March 19, 2008
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	A '''valid argument''', in [[formal logic]], one in which the conclusion is correctly derived from the premises.		A '''valid argument''', in [[formal logic]], one in which the conclusion is correctly derived from the premises.

−	{{quotebox\|A deductive argument is said to be valid when the inference from premises to conclusion is perfect. [http://www.~~google~~.com/~~url?sa=t&ct=res&cd=4&url=http%3A%2F%2Fwww.philosophypages.com%2Flg%2Fe01~~.htm~~&ei=bmLhR-jcEpyEygSC_KHZCQ&usg=AFQjCNGAdQx_uQsww5UmvYyOy8eUkMkrGA&sig2=t_MZ8Dqpj6mfQWYpq_aYjA~~]}}	+	{{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] }}