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deductive language Construct a deductive argument that is valid but not sound. Then, construct a valid deductive argument that is sound. Be sure to put the argument in premise-conclusion form.

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You will find an example of a sound and unsound deductive argument here.

A sound deductive argument would be:

All squares are rectangles.

A rectangle has four sides.

All squares have four sides.


This is sound because the definition of a square and rectangle both include that element of four sides.

An unsound argument would be:

All toads are cold-blooded.

All reptiles are cold-blooded.

All toads are reptiles.

In this case, toads and reptiles do share the same characteristics, but a toad is not a reptile.  It is an amphibian.


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