Guidelines for Categorical Syllogism Portfolio

Write out argument form

In this assignment, you will come up with 3 original examples of sound Categorical Syllogisms, to show that you know how to use them correctly.

1. Select three valid Categorical Syllogisms forms that are as different as possible (e.g., not EIO-1, EIO-2, and EIO-3). At a minimum, you should include at least one A, E, I, and O statement, each argument should have a different figure. In addition, one argument should have all universal statements, and the other two should include particular statements.

2. For each of them, replace S, P, and M so that the premises are uncontroversially true. It is easiest to start by generating conclusion, which determines the subject and the predicate, and then to find a middle term that makes both of the premises true. (Unlike Writing Assignment #1, the conclusion doesn’t have to be controversial, and the assignment is easier if it isn’t.)

Sample:

(EIO-1)

No Chevys are Fords.

Some cars are Chevys.

Therefore, some cars are not Fords.

3. Make sure to state the mood and figure at the beginning of the argument, and that none of the terms you use (subject, predicate, and middle term) are found in more than one of the arguments.

4. Use Venn diagrams to show that each of the arguments are valid.

Format: Typed, 12 point type, 1-1.5 inch margins, number and staple pages if more than one page. Make sure that the diagrams are neat and legible.