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Deductive, valid but unsound. Validity is a way of appraising the inference from premises to conclusion. Soundness adds the second dimension of whether or not the premises are true in addition to the argument being valid. Sound Valid True Premises. So, a valid argument with one or more false premises is unsound (not sound).Get an answer for 'Construct a deductive argument that is valid but not sound' and find homework help for other Logical Thinking questions at eNotes a deductive argument can be valid but not sound if the

A sound argument is a valid deductive argument with true premisses. A deductive argument cannot be both valid and unsound. A deductive argument can be either valid or invalid and still have true premisses. When the conclusion of a deductive argument is true, the argument must be sound.

This is a valid deductive argument, even though the premises are both false. But because those premises are not true, the argument is not sound. It is interesting to note that the conclusion is true, which shows that an argument with false premises can nevertheless produce a true conclusion. A deductive argument can be either valid or invalid and still have true premisses. When the conclusion of a deductive argument is true, the argument must be sound. When the premisses of a deductive argument are true, the conclusion is always true as well. If a deductive argument is sound, then the conclusion must be true. **a deductive argument can be valid but not sound if the** Feb 26, 2016 A sound argument is a deductive argument which is valid and furthermore all of its premises are true. So my above argument, that JFK was killed by laser beams, is valid but not sound, since both its premises are clearly false.

Validity and Soundness. A deductive argument is said to be valid if and only if it takes a form that makes it impossible for the premises to be true and the conclusion nevertheless to be false. Otherwise, a deductive argument is said to be invalid. A deductive argument is sound if and only if it is both valid, and all of its premises are actually true. *a deductive argument can be valid but not sound if the* Definition: A sound argument is a valid argument that has true premises. Firstly, a sound argument is a deductive argument. Its trying to establish conclusive support for its conclusion. Secondly, the argument is valid: the premises, if true, would guarantee that the conclusion is also true. And on top of all that, the premises are actually true.