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Logic
Terms and definitions from Introductory Logic
Question | Answer |
---|---|
Increasing Extension... | increases abstraction |
Increasing Intention... | increases concreteness |
Name the four combinations of quantity and quality that give us our four standard categorical statements. | Universal affirmative, universal negative, particular affirmative, particular negative |
Name the four letters of the square of opposition. | A, E, I, O |
Universal affirmative statements are also known as... | A statements |
Universal negative statements are also known as... | E statements |
Particular affirmative statements are also known as... | I statements |
Particular negative statements are also known as... | O statements |
Name the four categorical statements. | All S are P, No S are P, Some S are P, Some S are not P |
Define Contrariety. | Both statements cannot be true, but they can both be false. |
Define Subcontrariety. | Both statements can be true, but they cannot both be false. |
Define a Genus of a term. | It is a term that is more general, broad, or abstract then the original term and includes it. |
Define a Species of a term. | It is a term that is more specific, narrow, or concrete than the original term and is included by it. |
Define a Term. | It is a concept that can be expressed precisely. |
Define a Definition. | It is a statement that gives the meaning of a term. |
Define an Ambiguous word. | It is a word has more than one definition. |
Define a Vague word. | It is one whose extent is unclear. |
The Extension of a term is... | The sum of all the individual objects described by it. |
The Intension of a term is... | The sum of all the common attributes denoted by the term. |
Define a Statement. | It is a sentence which is either true or false. |
Define a Self-Supporting statement. | It is a statement whose truth value can be determined from the statement itself. |
A Tautology is... | A statement which is always true because of its logical structure. |
Define a self-contradiction. | It is a statement that is false due to its logical structure. |
A Supported statement is... | A statement whose truth value depends on evidence or information from outside itself. |
Two statements are related by Implication if... | The truth of one requires the truth of the other. |
Two statements are Logically Equivalent if... | They imply one another. |
Two statements are Independent if... | The truth or falsity of one has no effect on the truth or falsity of the other. |
Define the Subject of a statement. | It is the term being described, or about which something is asserted. |
Define the Predicate of a statement. | It is the term that describes or asserts something about the subject. |
The Quantity of a statement is... | The scope of its claim about the extension of the subject: universal (entire extension) or particular (partial). |
The Quality of a statement is... | The positive or negative nature of its claim about the subject: affirmative (asserts something) or negative (denies something). |
Define the Square of Opposition. | It is a diagram of the basic relationships between statements with the same subject and predicate. |
Define an Argument. | It is a set of statements, one of which appears to be implied or supported by the others. |
Define a Conclusion. | It is the statement which appears to be implied by the other statements in the argument, which are called premises. |
Define a Categorical Syllogism. | It is a deductive argument consisting of three statements in the categorical form that together use only three terms, called the major, minor, and middle. |
Define the Major term of a syllogism. | It is the predicate of the conclusion and is used in the major premise. |
Define the Minor term of a syllogism. | It is the subject of the conclusion and is used in the minor premise. |
Define the Middle term of a syllogism. | It is found once in each premise. |
Define the Major premise of a syllogism. | It is the premise containing the major term. |
Define the Minor premise of a syllogism. | It is the premise containing the minor term. |