Logic test 1 Practice

William S. Jamison Instructor

You have a total of 60 minutes to do this test. Answer all the questions following the instructions in each section.

Write out each of the following syllogistic forms, using S and P as the subject and predicate terms of the conclusion, and M as the middle term. Then test the validity of each syllogistic form by means of a Venn diagram.

1.1 AOO-1

1.2 EAE-3

1.3 AAA-2

1. Test the validity of the following categorical syllogisms with Venn diagrams. Where the syllogisms are not in standard form, put them in standard form first.

2.1. All hippies are pot smokers.

No pot smokers are law-abiding citizens.

Therefore some law-abiding citizens are hippies.

2.2. Some Buddhists are monks,

so some Buddhists are ascetics,

since all monks are ascetics.

2.3. All hallucinogens are dangerous things.

Some drugs are hallucinogens.

Therefore, some drugs are dangerous things.

3. Name the rules broken, and the fallacies committed, by the invalid syllogisms of the following forms:

3.1 EEE-1

3.2 III-3 

3.3 AAA-3

Bonus question: translate this into standard form:

Nothing is certain except death and taxes.

End of test.