Logic & Argument Basics Flashcards
perception
learning through directly taking in the world around us
testimony
learning by trusting reliable person (science, history
inference
certain thins are indicators of other things
indicator/sign
target fact
Argument
series of propositions/statements, where one is a conclusion (what you want the person to believe) and the other is the premise (reason/s in support)
Logic
Academic discipline devoted to understanding and analyzing how reasons support conclusions
claim without premise
only an assertion
hidden premises
feel like they can go left unsaid / unexplained
principle of charity
assume someone is rational unless proved to be otherwise
reason
support your conclusions - persuasion
explanation
not used to convince, how things are
Deductive argument
an argument which, if successful proves or guarantees its conclusion
Inductive argument
an argument which, if successful, only establishes that is conclusion is more likely
Reasons
Support conclusions - persuasions
Explanations
not used to support, these are facts and they are accepted as true
form
structure, how the premises are put together, can be represented with symbols
content
the actual truth of the premises
logical strength
how well it is structured (form) - blue prints to a house, nothing to do with validity
factual strength
are the premises true or not (content) - the material with which a house is made of (good lumber)
Argument from sample
(inductive)
take something and assume the larger pop. will have that too. finding a general feature of a sample set and then extrapolate from this to make a claim about the larger population from which it was taken
convergent arguments / balance of considerations
(inductive)
used when we have to make decisions about some course, tally up major reasons for or against a choice
Inference to the best explanation (inductive)
the premises are some set of data we need to explain and the conclusion is the explanation that we think best does so.
Explanatory power
Inference to the best explanation - can this explain for everything better than other possible explanations
Coherence
Inference to the best explanation - does this cohere with other things I know, background info goes with your explanation
Simplicity
Inference to the best explanation - if both explanations are strong, this is the tie breaker, which one has the least assumptions, less number of theoreticals
Validity
term for logical strength in deductive arguments, if the premises are true, it forces a true conclusion (inductive arguments cannot be valid)
Soundness
when an argument is both valid and has true premises. This also guarantees a true conclusion