Reference no: EM132305988
Categorical Syllogism Questions -
The following five passages contain arguments. For each argument formulate it as a standard form categorical syllogism. Indicate the Major Term, Minor Term, and Middle Term of each categorical syllogism. Indicate the mood and figure of each categorical syllogism. Assuming the Boolean Standpoint, determine the validity of each categorical syllogism by producing a Venn Diagram for the syllogism. Provide a brief statement about the Venn Diagram that indicates what in the diagram shows invalidity or validity. If the categorical syllogism is invalid explain which of our text's rules of validity the categorical syllogism violates. HINTS: You may have to translate some premises or conclusions into standard form categorical propositions. This may also involve using the conversion, obversion, or contraposition operations. Question 5 is an enthymeme. An enthymeme is an argument that is expressible as a categorical syllogism but is missing a premise or a conclusion. When completing an enthymeme you should always try to make the resulting categorical syllogism valid.
1. It must be the case that all animals are able to think. Since all animals feel pain, and all things that feel pain are able to think.
2. All messengers who bring bad news are unwelcome. All messengers who bring bad news are punished. Therefore, some unwelcome persons are punished.
3. No syllogisms are arguments with four terms. Some arguments with four terms are invalid. So, no syllogisms are invalid.
4. Whales have lungs, but no fish do; so whales aren't fish.
5. No students are boring, and some professors are boring.
This assignment, like all the assignments and term exams for this section of PHIL 1320, contains some questions from some of the following:
1. Baronett, Stan. Logic Second Edition. OUP. (New York: 2013) ISBN 978-0-19-984631-3.
2. Flage, Daniel E.. Understanding Logic. Prentice-Hall. (Englewood Cliffs New Jersey: 1995) ISBN 0-02-338173-6.
3. Salmon, Merrilee H.. Introduction to Logic and Critical Thinking Third Edition. Harcourt Brace & Company. (Fort Worth: 1995) ISBN 0-15-543064-5.
4. Warmbrod, Ken. Logic and Philosophy of Logic Course Guide for Philosophy 2430. University of Manitoba. (Winnipeg: 2013) ISBN 978-0-200-00202-8.