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What is considered an invalid use of the instrument? Give an example.

User DRoyson
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Final answer:

An invalid use of the instrument in argumentation refers to a fallacy where the conclusion does not logically follow from the premises, exemplified by a non sequitur.

Step-by-step explanation:

An invalid use of the instrument occurs in argumentation when the logic or reasoning used to arrive at a conclusion does not logically follow from the premises. A classic example of this would be a non sequitur, where the conclusion does not logically follow from the premises, even though the premises themselves might be true.

Example:

Premise 1: All humans are mortal.
Premise 2: Socrates is a human.
Conclusion: Therefore, all mortals are humans.

The premises are true, but the conclusion wrongly asserts a reciprocal relationship that is not supported by the premises. This is a clear case of invalid reasoning.

User Jeevan Pingali
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