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PHILOS 006 LACC Valid Categorical Syllogism Worksheet

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This is a tricky assignment, make sure you are clear about exactly what a categorical syllogism is; it has to be in the correct form.

After reviewing the lecture on deduction:

Create a valid categorical syllogism on a contemporary moral or social issue.

A categorical syllogism has two premises and a conclusion. All three statements are categorical propositions (containing a quantifier. class term, copula, and another class term)

For example, All dogs are mammals- all is the quantifier, dogs is a class term, are is the copula, and mammals is another class term.

A categorical syllogism has three terms (these terms refer to classes) the subject term (or minor term) , the predicate term (or major term), and the middle term.

The first premise contains the predicate term and the middle term; the second premise contains the subject term and the middle term, and the conclusion contains the

subject term and the predicate term. Here is an example:

No life-saving procedures are immoral procedures

Some abortions are life saving procedures

Therefore, some abortions are not immoral procedures

In this syllogism, the subject term is abortions, the predicate term is immoral procedures, and the middle term is life saving procedures.

Construct a Venn diagram to make sure your syllogism is valid

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