Logical fallacies Flashcards
premise
the assumptions that logical deductions are based on
rationalism
school of philosophy which holds that reason is the most important source of knowledge
falacies
invalid patterns of reasoning
syllogism
a deductive argument with 2 premises, a conclusion, 3 terms that are repeated twice, and quantifiers
[quantifier] things in group A are in group B
[quantifirer] things in group C are part of group A
Therefore [quantifier] things in group C are part of group B
quantifiers
words which tell us the quantity that is being referred to in a syllogism (eg. all, some, no)
truth
a property of statements concerned with what is or is not the case
validity
a property of arguments concerned with whether conclusions follow from premises
belief bias
the tendency to believe that an argument is valid simply because we agree with the conclusion
enthememe
an incomplete argument where one premise is assumed to be obvious
induction
reasoning that goes from specific to general truths
deduction
reasoning that goes from the general to the particular
inductive inference
generalizing from the observed to the unobserved
a generalization from “all observed A are B” to “all A are B”
hasty generalisations
generalizing form insufficient evidence
confirmation bias
people tend to remember only evidence that supports their beliefs
post hoc ergo propter hoc
assuming that because B follows A, then A must be the cause of B
(not valid)