Lesson 2 Flashcards
What are the problems with the imagination test ?
- Limited power of imagination
- Cognitive and confirmation bias
- Inconsistencies
What is the imagination test
You are able to imagine a situation where the premises are true and the conclusion is false- making it invalid
What is the intuition test
When you intuit or intellectualize and argument to determine its validity
What are the problems with the intuition test
- Incorrect results
- Limited scope
- Intuition doesn’t exist
When is an argument deductively invalid
When it is possible for the premises to be true and the conclusion false
When is an argument deductively valid
When it is impossible for an argument to have true premises and a false conclusion
What are the two clarifications towards deductively valid arguments
- Don’t confuse truth with validity
- Arguments are valid- not propositions
Can a deductively valid argument have false premises
Yes
Can a deductively valid argument have a false conclusion?
No
Is this argument deductively valid
P1- All pigs can fly
P2- Wesley is a pig
P3- Wesley can fly
yes.
An argument is objectively good when it has what
All true premises and the conclusion follows from the premises
What are the two objective ways of evaluating an argument
- Examine if each proposition is true or false
- Consider the relation the premise have to the conclusion
Objective arguments are what
Arguments independent of emotion
Subjective arguments are what
Depend on how someone feels about an argument
An argument is inductively strong if
it is likely the conclusion is true given the premises
