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Types of Argumentation

Induction

Inductive arguments are those in which a conclusion is drawn about a class of objects, based upon the characteristics observed in a sample of that class. Such arguments are persuasive to the extent that the sample was connected causally to the larger class in such a way that the characteristics of the larger class will be reflected in the sample. For example, "Most of the jellybeans in my hand are red. They were taken from this jar, and I mixed them up well before I took them out. So most of the jellybeans in this jar are red." Because inductive arguments turn upon the causal connection between a sample and a larger class, they allow us to draw conclusions that extend beyond what is said in the premisses. Induction indicates facts about the world beyond what we actually observe; but this also makes induction open to the possibility of error. Given the truth of the premisses, the conclusion is probably true, but even true premisses cannot guarantee a true conclusion.

 

In induction the minor premiss is a CASE, as it is in deduction - a class subsumed under a rule that we propose to test. However, the major premiss is the RESULT of observations made on that class. The observations, then, tend to confirm the RULE. An induction moves from CASE and RESULT to RULE:

 

Socrates is mortal.

 

A RESULT - an observable fact about Socrates.

 

Socrates is a man.

 

A CASE - Socrates is a sample or instance of the class men.

 

Hence, All men are mortal. A RULE - a generalization beyond the sample.

 

In addition to the identification of fallacies, it is possible to critique the strength or weakness of inductive arguments. Click here for an explanation of the critique of Inductive arguments.

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