Final Exam Prep Flashcards
Naturalistic Fallacy
When an argument attempts to extract a moral conclusion from alleged facts about the world
Logical fallacy
A class of fallacy that can be given formal or quasiformal definition with regard to argument structure.
Any kind of error in reasoning that renders an argument invalid
Non sequiter
A Latin term loosely translated as “it doesn’t follow”
ignoratio elenchi
An argument with an irrelevant conclusion.
Not valid
Affirming the Consequent
- If P then Q
- Q
Therefor, - P
(Conditional Fallacy)
Denying the Antecedent
- If P then Q
- It is not the case that P
Therefore, - It is not the case that Q
(Conditional fallacy)
(Quantifier) Scope Fallacy
A fallacy that consists in a misordering of a universal quantifier (all, every, each) and an existential quantifier (some, a, the, one), resulting in an invalid inference.
(Logical fallacy)
Equivocation
Fallacy
Disguising an invalid inference by using a single expression in two different ways.
(logical fallacy)
Evidential Fallacy
Evidential fallacies are defined in terms of not meeting the aim to show its conclusion to be reasonably likely
Argument from Ignorance
(Evidential fallacy)
1. We have no evidence that P
Therefore,
2. It is not the case that P
Arguments from Missing Evidence or Non-Fallacious instances
if you arrive at P without any thorough search using appropriate methods.
(Evidential fallacy)
Overgeneralizations
Drawing a general inference too strong for specific evidence in hand. (Hasty Generalization or Sweeping Generalization)
(Evidential fallacy)
Conspiracy Theories
- There is no evidence that P.
- No evidence is exactly what we should expect if P is true.
Therefore, - P.
(Evidential fallacy)
Vicarious Authority
Argument from Authority or Genetic Fallacy: evaluating a claim on the basis of irrelevant facts about its origins, rather than on the basis of the evidence for it. If the claim is justified by appeal to proper authority, the justification may be evidentially cogent.
(Evidential Fallacy)
Appeal to Popular Opinion
- it is widely believed that P.
Therefore, - P.
“Do you think that all these people could be wrong?”
“If there is such an obvious problem with P, how come so many people believe it?”
(Evidential Fallacy)
Multiple Endpoints.
This is the biggest or probable threat to statistical reasoning in the methods of good science.
This fallacy occurs when we first gather data and then look for the significance, instead of first deciding on a hypothesis and then testing it. Also known as the Sharpshooter Fallacy.
(Evidential Fallacy)
Procedural and Pragmatic Fallacies
Argumentative or conversational moves that undermine good reasoning by distracting the discussants for, the real issues or otherwise damaging the procedure for exchanging ideas and evidence.
Fallacy of Relevance
introducing irrelevant factors to the real issue under discussion. these may be deployed as rhetorical factors.
(distractors) (Procedural and pragmatic fallacies)
Red Herring
Statements or objections that lead the discussion away from the key point, especially when there is some suggestion that this is done deliberately.
(Procedural and pragmatic fallacies) (distractor) (fallacy of relevance)
Straw man fallacy
Misrepresenting an argument or a view in order to refute a dumbed-down version of it. (The idea behind the name is that you build a dummy opponent out of straw instead of confronting the actual opponent. Most often it is a mostly unintentional result of thinking the worst of one’s opponent (Procedural and pragmatic fallacies) (Distractor)
Ad Hominem
Another species of genetic fallacy. it involves dismissing an argument on the basis of personal facts about the arguer. It can be a matter of saying something insulting or nasty about someone, but it need not be (Procedural and pragmatic fallacies) (Distractor)
Poisoning the well
Related to ad hominem. A statememnt poisons the well if it is a general attack on the worth or reliability of an arguer’s utterences. If successful this can have the effect of destroying the very conditions required for the rational dialog. It is different from ad hominem.
To dismiss an argument don’t he grounds of the speaker’s criminal past, whether or not they have one is probably just ad hominem. To dismiss an argument with the claim that the speaker is just conditioned to say that sort of thing is to poison to well. It taints everything the speaker might say and undermines the whole conversation. A mix of ad hominem and sweeping generalization.
(Procedural and pragmatic fallacies) (Distractor)
The Mrs Lincoln Fallacy
The fallacy of ignoring completely relevant factors.
Procedural and pragmatic fallacies) (Distractor
Begging the question or circular argument.
An argument is circular when it assumes the truth of what it purports to prove. The most direct way of committing the fallacy is for the conclusion of an argument to also be one of its premises
A circular argument is always valid and sound as long as the premise and conclusion are true.
It is a fallacy if it fails to provide a reason to believe its conclusion
(Procedural and pragmatic fallacies) (Confusions)
False Presuppositions
A presupposition are propositions that one must grant or assume in order for a statement to make sense. The problem is that a statement’s presupposition may be false.
Lying about the pretense of an argument
(Procedural and pragmatic fallacies) (Confusions)
Fallacies of Definition and Connotation
Assumptions and Biases may find their way into a persuasive case without being explicitly represented in the premises is through the particular choice of words and the communicators’ assumptions about them.
Slanting Language
it is committed in its most general form when a speaker describes some situation in terms that already entail or suggest the desired conclusion.
example: “Abortion is immoral right from conception, because a baby has a right to life” The term baby has an emotional connection to it but is not an accurate depiction of a 1 or 2 celled organism. The term is being used to illicit an emotional response.
example: what is Moral in relation to the statement that person A asserts might not be Moral for person B and his or her choice of words in their statement.
( Fallacies of Definition and Connotation)
Persuasive definition
Not simply describing something in question-begging terms, but attempting to define it in such language