Venn diagrams Flashcards
(30 cards)
What is a syllogism?
A syllogism is an argument with 2 premises and a conclusion
What is a categorical proposition?
A categorical proposition is a proposition that asserts or denies all or some of the members of one category belong to another
What is a categorical syllogism?
A categorical syllogism is a syllogism where the premises and conclusion are categorical propositions
What is a quantifier?
A quantifier is the term that describes how many of something (e.g. ALL cats)
What is a minor term?
A minor term is the term that occurs first in the conclusion
What is a major term?
A major term is the term that occurs second in the conclusion
What is a predicate term?
A perdicate term is the term that occurs second in the conclusion
What is a subject term?
A subject term is the term that occurs first in the conclusion
What is a middle term?
A middle term is the term that appears in both premises, but not in the conclusion
What are the 4 forms in a categorical syllogism?
A, E, I, O
What does the form A mean?
All S are P
What does the form E mean?
No S are P
What does the form I mean?
Some S are P
What does the from O mean?
Some S are not P
When making a Venn diagram, which circle represents the major term?
Bottom right
When making a Venn diagram, which circle represents the minor term?
Bottom left
When making a Venn diagram, which circle represents the middle term?
Top
Which sections of a Venn diagram are shaded for the mood AII?
Sections 1 and 2 shaded, x in section 3
What does an x in a Venn diagram mean?
Some
How can you tell an argument is valid using a Venn diagram?
If the shaded diagram correctly represents the premises and conclusion
What is an informal fallacy?
An informal fallacy is a logical mistake that cannot be shown to be invalid using a Venn diagram or truth table
What is an abusive ad hominem?
An insult in place of a proposition (e.g. your opinion doesn’t matter because you suck)
What is a circumstantial ad hominem?
Assuming that someone’s views are a function of their position (e.g. CEO says the company needs to raise their prices, but of course he would say that)
What is a tu quoque?
Pointing out that a critic does exactly what they are criticizing you for (e.g. you say we should study hard, but you don’t study hard)