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35 Cards in this Set

  • Front
  • Back
Logic
Organized Body of Knowledge, or science, that evaluates arguments
Argument
A group of statements one or more of which the premises are claimed to provide support for, or reasons to believe the conclusion.
Statement
A sentence that is either true or false
Premise
A statement in an argument that sets forth evidence or reasons
Conclusion
The statement in an argument that the premises are claimed to support or imply
Inference
The reasoning process used to produce an argument
Proposition
The information content of a statement
Truth Value
The attribute by which a statement is true
Conditional Statement
An if..., then.... statement
Antecedent
The section of a condition statement after if and before then
Consequent
The section of a conditional statement that follows then...
Explanation
A statement or group o statements intended to shed light on some event
Illustration
A kind of nonargument composed of statements intended to show what something means or how something is done
Expository Passage
A kind of nonargument consisting of a topic sentence and are or more sentences that expand on the topic sentence
Deductive Argument
An argument which the arguer claims are impossible for conclusion to be wrong
Inductive Argument
An argument which the arguer claims are improbable for the conclusion to be wrong.
Argument based on Mathematics
A deductive argument in which the conclusion depends on some purely arithematic or geometric computation or measurement.
Argument From Definition
A deductive argument in which the conclusion is claimed to depend merely upon the definition of some words or phrases used in the premise or conclusion.
Categorical Syllogism
A syllogism in which all 3 statements are categorical prepositions. A syllogism in which all 3 statements begin with the words all, none, some, etc.
Ex: P1:All men are mortal
P2: Socrates is a man
C: Socrates is a mortal
Hypothetical Syllogism
A syllogism having a conditional statement for one or both of its premises.
EX: P1:If john loves mary, then he will marry her
P2: John loves marry
C: John will marry Mary
Disjunctive Syllogism
A syllogism having a disjunctive statement for one of its premises.
Ex:P1:either mary is a republican or a democrat
P2: She is not a republican
C: She is a democrat
Argument From Analogy
An inductive argument that depends on the existence of a similiarity between 2 things or states of affairs
Ex:P1: Entity A has Features a,b,c and z
P2: Entity B has features a,b,c
C: Entity B will probably have feature z
Generalization
An inductive argument that proceeds from the knowledge of a selected sample to some claim about the whole group.
Prediction
An inductive argument that proceeds from our knowledge of a selected claim about the future.
Argument from Authority
An inductive argument that concluded something is true because a presumed expert or witness has said that it is.
Ex:P1:Authority X claims C
C: C is either true or false
Arguments Based on Signs
An inductive argument that proceeds from the knowledge of a sign to a claim about the thing or situation that the sign is symbolizing.
Casual Inference
An inductive argumnent that proceeds from the knowledge of a cause to a claim about an effect.
Ex: Cause leads to a effect, or Effect leads to a cause
Valid Argument
An argument in which it is impossible for the conclusion to be false given the premises are true. Any argument that doesnt have true premises and a false conclusion
Invalid Argument
A deductive argument which its possible for conclusion to be wrong given the premises are true. Only invalid argument is true premises and false conclusion
Sound Argument
A deductive argument that is valid and has all true premises. So all true premises and true conclusion
Unsound argument
A deductive argument that is either invalid or has one of the premises are false.Any argument that is not sound
Strong Argument
An inductive argument in which its improbable that the conclusion be false given that the premises are true.
Weak Argument
An inductive argument in which the conclusion doesn't follow probably from the premises.
Cogent Argument
An inductive argument that is strong and has all true premises
Uncogent argument
An inductive argument that is either weak or has on or more false premises.