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logic
intro
38
Philosophy
Undergraduate 3
05/19/2009

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Term
reason
Definition
Why one should or should not believe/ do or not do something
Term
Justification
Definition
A good reason to accept or reject some argument
Term
Rhetoric
Definition
Any verbal or written attempt to persuade someone to believe, desire or do something that does not attempt to give good reasons for the belief, desire, or action, but attempts to motivate that belief, desire or action solely through the power of the words used
Term
Attempt to Persuade
Definition
(by argument) an attempt to provide you with reasons for believing a claim, desiring something or doing something
Term
argument
Definition
A set of propositions of which one is a conclusion and the remainder are premises, intended as support for the conclusion
Term
True
Definition
To say that a claim is true is to say that what is claimed is how things actually are
Term
conclusion
Definition
The primary claim, the one we are trying to get others to accept
Term
premise
Definition
the supporting claims, the ones intended to give us reason for accepting the conclusion
Term
rhetorical force
Definition
The part of the argument that is not part of the propositional content; it is emotive or otherwise suggestive window-dressing surrounding the proposition, which may be used to persuade us
Term
Implicature
Definition
meaning, which is not stated, but which one can reasonably take to be intended, given the context in which the sentence is written or uttered.  Cannot typically be interpreted according to conventions covering our ordinary use of the words in the sentence used
Term
context
Definition
 the circumstances in which the passage or speech appeared or took place
Term
Extended Arguments
Definition
chains of arguments using conclusions as premises
Term
Indicator Words
Definition
words that introduce or frame the conclusion and premises
Term
Explicit Conclusion
Definition
: a writer or speaker expresses her conclusion directly and more or less clearly
Term
Implicit Conclusion
Definition
they are only implied or suggested by the actual text or speech content, not explicitly expressed by it
Term
Premise Indicators
Definition
words that indicate the presence of premises
Term
Explanation
Definition
the speaker assumes that his or her audience already accepts the proposition/ conclusion is true
Term
Argument
Definition
the speaker does not assume that his or her audience already accepts the propositions and attempts to provide reasons for doing so
Term
Justification
Definition
we want the person to give us an argument for why the actions is reasonable or acceptable
Term
Intermediate Conclusion
Definition
A conclusion that serves as a premise for another argument→extended arguments
Term
Ambiguity
Definition
a sentence, in a given context, where there is more than one possible way of interpreting it
    Lexical: the specific, individual word is ambiguous
    Syntactic: the arrangement of the words is ambiguous
Term
Vaugeness
Definition
: a feature of a word’s meaning-the meaning is indefinite or uncertain as to what is conveyed-different people have different definitions
Term
Extension of a Term
Definition
: the range of things to which a word applies
Term
Primary Connotation
Definition
the accepted characteristics to which a word applies
Term
Secondary Connotation
Definition
: The further characteristics to which a word applies
Term
Metaphorical Uses of Language
Definition
metaphors bring only the secondary connotation of a word into play
Term
Rhetorical Question
Definition
take the form of a question but indirectly assert a proposition
Term
Counterexamples
Definition
Cases that we use to challenge the truth of a generalizing claim
Term
Generalization
Definition

a statement about a category of things


    hard: intends to apply without exception
    soft: statement that normally/typically, generally, usually, on average, for the
    most part, applies

Term
Argument Reconstruction
Definition
the representation of arguments in standard form, so as to give us a clear and comprehensive view of them
Term
Argument Assesment
Definition
the determination of whether or not arguments provide good reasons for accepting their conclusions
Term
Deductive Validity
Definition
to say than an argument is valid is to say that it would be impossible for all the premises of the argument to be true, but the conclusion false
and also—to say than an argument is valid is to say that if the premises are (or were) true, the conclusion would also have to be true
Term
Whether or not they are actually true, suppose or pretend that the premises were all true; then in that situation—aside from how things actually are—could the conclusion conceivably be false? If it could not be false, then the argument is valid.  If it could be false then the argument is invalid
Definition
Term
Logic
Definition
the systematic study of validity
Term
A Conditional
Definition

A statement in which there is one clause dependent upon another clause, usually best expressed in the if-then form


    Antecedent: the ‘if’ clause
    Consequent: the ‘then’ clause

Term
Deductive Soundness
Definition
To say than an argument is deductively sound is to say that the argument is valid and all its premises are (actually) true
Term
Deductively Unsound
Definition
an argument that has one ore more false premises or is invalid
Term
Argument Tree
Definition
a device that can be used for representing arguments in the form of a diagram
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