Verbal Flashcards
One Sentence Test
“if author had to boil this entire argument down to one sentence that retains his main point, which sentence would it be?”
Denial Test
an assumption MUST be true for the conclusion to logically follow from evidence
denial test: negate each answer choice to find one where author’s argument falls apart. the one that does is a necessary assumption.
don’t be extreme when negating (denial of hot is not cold it’s NOT HOT)
when denying if/then, negate “then” or the result
if argument does not fall apart or is unaffected after negation, the answer choice is wrong.
Common Flaws
- confusing correlation with causation
- confusing percent and actual value
- unsupportable scope shifts between evidence and conclusion
- overlooked alternatives (most common)
- inappropriate combination or distinction of terms (flaw of equivocation)
ALL flaws center on author’s assumption
Representativeness
any argument based on a group or sample (from surveys, polls, studies, anecdotes, or experiments)
needs to be a good representation - come from large enough sample, cover an adequate amount of time, population can’t be biased
ASSUME sample is representative
compare population of the evidence with that of conculsion
P/P/P
an argument’s conclusion is a plan, prediction, or proposal
ASSUME that P/P/P could work or happen, practical under circumstance, there is only one most important factor (or only 1 factor) worth considering
to weaken: introduce alternative or competing consideration (plan won’t work) - raise concern author fail to see that would undermine proposal
to weaken prediction: show that trend will change or is unlikely to happen
to weaken an objection to a P/P/P: seek evidence that it will work or come true
look for: should, would, could, may, will, is going to
Causality
cause and effect
any argument that says something did or will happen because of something else
x caused y or y is a result of x
relies on assumptions:
that nothing else caused y but x
that y was not the cause of x
that the apparent relationship between x and y is not just a coincidence
to recognize: if/then, because, correlate, cause, as a result
to weaken: alternative explanation (z caused y, not x), , causality reversed (y caused x), coincidence (it wasn’t x that caused y, no correlation between x and y)
Assumption
unstated evidence necessary to make argument work/bridges gap between evidence and conclusion (sometimes evidence and evidence)
author MUST believe!
evidence + assumption = conclusion