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Intro to Logic
Ch. 1 intro to logic definitions
40
Philosophy
Undergraduate 2
10/03/2011

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Cards

Term
logic
Definition
the organized body of knowledge that evaluates arguments
Term
argument
Definition
a group of statements one or more of which the premises are claimed to provide support for the conclusion
Term
statement
Definition
a declarative sentance that is either true or false
Term
truth value
Definition
truth and falsity of a statement
Term
premise
Definition
statements that claim to support the conclusion
Term
conclusion
Definition
statement that the evidence is claimed to support
Term
premise indicators
Definition
  1. since
  2. as indicated by
  3. because
  4. for
  5. in that
  6. may be inferred from
  7. as
  8. given that
  9. seeing that
  10. for the reason that
  11. in as much as
  12. owing to
Term
conclusion indicators
Definition
  1. therefore
  2. wherefore
  3. thus
  4. consequently
  5. we may infer
  6. accordingly
  7. we may conclude
  8. it must be that
  9. for this reason
  10. so
  11. entails that
  12. hence
  13. it follows that
  14. implies that
  15. as a result

 

Term
inference
Definition
the reasoning process expressed by an argument
Term
proposition
Definition
the meaning or information content of a statement
Term
warning
Definition
a form of expression intended to put someone on gaurd against a dangerous or detrimental situation
Term
piece of advice
Definition
a form of expression that makes a recommendation about some future decision
Term
statement of opinion
Definition
an expression about what someone happens to believe or think about something
Term
loosely associated statement
Definition
may be about the same general subject but lacks a claim that one of them is proved by the others
Term
report
Definition
a group of statements that convey information about some topic or event
Term
expository passage
Definition

a kind of discourse that begins with a topic sentence followed by one or more sentences that develop the topic sentence

*can be both argument and nonargument

Term
illustration
Definition

an expression involving one or more examples that is intended to show what something means or how it's done

*can be both argument or non

Term
argument from example
Definition
illustration and expository statements that are arguments
Term
explanans
Definition
the statement or group of statements that purports to do the explaining
Term
explanandum
Definition
the statement that describes the event or phenomenon to be explained
Term

conditional statement

Definition
an "if....then...." statement
Term
antecedent
Definition
the component immediately following the "if"
Term
consequent
Definition
the component statement immediately following the "then"
Term
necessary condition
Definition
b is a necessary condition for a whenever a cannot occur without an occurence of b
Term

sufficient condition

 

Definition
a is a sufficient condition for b when the occurence of a is all that is needed for the occurence of b
Term
deductive argument
Definition
an argument in which it is impossible for the conclusion to be false given the premises are true
Term
inductive argument
Definition
an argument in which it is improbable that the conclusion is false given that the premises are true
Term
argument based on mathematics
Definition
the conclusion depends on some purely arithmetic or geometric computation or measurement
Term

argument by definition

 

 

Definition

the conclusion is claimed to depend merely on the definition of some word or phrase used in the premise or conclusion

 

Term
categorical syllogism
Definition
a syllogism in which each statement begins with one of the words all no or some
Term
hypothetical syllogism
Definition
a syllogism having a conditional "if...then..." statement
Term
disjunctive syllogism
Definition
a syllogism having a disjunctive "either...or..." statement
Term
prediction
Definition
an argument that proceedes from our knowledge of the past to a claim about the future
Term
argument from analogy
Definition
depends on the existence of a similarity between two things
Term
generalization
Definition
an argument that proceedes from th eknowledge of a selected sample to some claim about a whole group
Term
argument from authority
Definition
concludes something is true becasue a presumed expert or witness has said that it is
Term
argument based on signs
Definition
proceeds from the knowledge of a sign to a claim about the thing or situation that the sign symbolizes
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