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)
causation vs correlation
causation is the direct cause of an event, and correlation is connection between two events
ad hominem fallacy
attacking or supporting the person making an argument rather than the argument itself
vested interest
a personal stake or involvement in an undertaking or state of affairs
circular reasoning
assuming the truth of something that you are supposed to be proving
aka. vicious circle, begging the question
special pleading
making an exception in your own case that you would not find acceptable if it came from someone else
equivocation
when a word is used in two different senses in an argument
argument ad ignorantiam
claiming that something is true on the grounds that there is no evidence to disprove it
false analogy
assuming that because two things are similar in some respects they must also be similar in some further respect
false dilemma
assuming that only two alternatives exist when there is actually a wider range of options
binary thinking
the tendency to divide things into two types and see the world in black and white terms
loaded questions
a question that contains a built-in assumption that has not been justified and may be false
loaded statemetns
statements that contain build-in assumptions
what are the “10 deadly fallacies”?
ad ignorantiam
hasty generalizatrion
post hoc ergo propter hoc
ad hominem
circular reasoning
special pleading
equivocation
false analogy
false dilemma
loaded question