Philosophy Final Part 2 Flashcards
difference between thinking and reasoning
reasoning is when you consider reasons for or against a claim
inference
reach line of reasoning used in an argument
argument
putting a line of reasoning into words using premises so people can follow it
standard form
p1, p2,…
c1, c2, ….
deductive argument
conclusion is true if premises are true
inductive argument
adequate support is provided for conclusion, but its not guaranteed
how to identify missing premises
search for a premise that:
- the author could be taking for granted
- makes the argument as good as possible
truth
correspondence of reality with reality itself
empirical
can be settled by observation
i.e. observed by senses or sciences
non-empirical
cannot be known through observations i.e its always wrong to lie, all bachelors are male
generality
has to do with the size of the circle within which things are encompassed
vagueness
how fuzzy are the boundaries
ambiguity
is it unclear what the term means (i.e. borderline cases, baldness)
loaded language
certain terms have positive or negative connotations
i.e. thrifty vs cheap
strawmanning
trying to refute an argument someone didn’t mean to say (assuming they’re making the worst possible argument)
referential ambiguity
words can be interpreted in two different ways
grammatical ambiguity
sentence can be interpreted in two different ways
logical strength
how well the premises would support the conclusion if they were true
sound
premises would support the conclusion if they were true
cogent
argument that’s premises are convincing to the audience and they realized its logically strong
deductive validity
if the premises were true, they would guarantee the truth of the conclusion
modus ponens
if P then Q
P
Q
modus tollens
if P then Q
not Q
Not P
T structure
premises only support the conclusion when taken together
V structure
premises provide individual support for the conclusion
what it takes for a deductive argument to be invalid
the conclusion does not follow from the premises, assuming they are true