Logical Fallacies Flashcards
Strawman
Strawman
Misrepresenting someone’s argument to make it easier to attack.
After Will said that we should put more money into health and education, Warren responded by saying that he was surprised that Will hates our country so much that he wants to leave it defencless by cutting military spending.
Slippery Slope
Slippery Slope
Asserting that if we allow A to happen, then Z will consequently happen, too, therefore A should not happen.
Colin Closet asserts that if we allow same-sex couples to marry, then the next thing we know we’ll be allowing people to marry their parents, their cars, and even monkeys.
Special Pleading
Special Pleading
Moving the goalposts to create exceptions when a claim is shown to be false.
Edward Johns claimed to be psychic, but when his ‘abilities’ were tested under proper scientific conditions, they magically disappeared. Edward explained this saying that one had to have faith in his abilities for them to work.
The Gambler’s Fallacy
The Gambler’s Fallacy
Believing that ‘runs’ occur to statistically independent phenomena such as roulette wheel spins.
Red had come up six times in a row on the roulette wheel, so Greg knew that it was close to certain that black would be up next. Suffering an economic form of natural selection with this thinking, he soon lost all of his savings.
Black-or-White OR Either / Or
Black-or-White OR Either / Or
Where two alternative states are presented as the only possibilities, when in fact more possibilities exist.
Whilst rallying support for his plan to fundamentally undermine citizens’ rights, the Supreme Leader told the people they were either on his side, or on the side of the enemy.
We can either stop using cars or destroy the earth.
False Cause
False Cause
Presuming that a real or perceived relationship between things means that one is the cause of the other.
Pointing to a fancy chart, Roger shows how temperatures have been rising over the past few centuries, whilst at the same time the number of pirates have been decreasing, thus pirates cool the world and global warming is a hoax.
Ad Hominem
Ad Hominem
Attacking your opponent’s character or personal traits in an attempt to undermine their argument.
After Sally presents an eloquent and compelling case for a more equitable taxation system, Sam asks the audience whether we should believe anything from a woman who isn’t married, was once arrested, and smells a bit weird.
Loaded Question
Loaded Question
Asking a question that has an assumption built into it so that it can’t be answered without appearing guilty.
Grace and Helen were both romantically interested in Brad. One day, with Brad sitting within earshot, Grace asked in an inquisitive tone whether Helen was having any problems with a fungal infection.
Bandwagon
Bandwagon
Appealing to popularity or the fact that many people do something as an attempted form of validation.
Shamus pointed a drunken finger at Sean and asked him to explain how so many people could believe in leprechauns if they’re only a silly old superstition. Sean, however, had had a few too many Guinness himself and fell off his chair.
Begging the Question
Begging the Question
A circular argument in which the conclusion is included in the premise.
Filthy and polluting coal should be banned.
The word of Zorbo the Great is flawless and perfect. We know this because it says so in The Great and Infallible Book of Zorbo’s Best and Most Truest Things that are Definitely True and Should Not Ever Be Questioned.
Appeal to Authority
Appeal to Authority
Using the opinion or position of an authority figure, or institution of authority, in place of an actual argument.
Not able to defend his position that evolution ‘isn’t true’ Bob says that he knows a scientist who also questions evolution (and presumably isn’t a primate).
Appeal to Nature
Appeal to Nature
Making the argument that because something is ‘natural’ it is therefore valid, justified, inevitable, good, or ideal.
The medicine man rolled into town on his bandwagon offering various natural remedies, such as very special plain water. He said that it was only natural that people should be wary of ‘artificial’ medicines such as antibiotics.
Composition / Division
Composition / Division
Assuming that what’s true about one part of something has to be applied to all, or other, parts of it.
Daniel was a precocious child and had a liking for logic. He reasoned that atoms are invisible, and that he was made of atoms and therefore invisible, too. Unfortunately, despite his thinking skills, he lost the game of hide and go seek.
Anecdotal
Anecdotal
Using personal experience or an isolated example instead of a valid argument, especially to dismiss statistics.
Jason said that that was all cool and everything, but his grandfather smoked, like, 30 cigarettes a day and lived until 97 - so don’t believe everything you read about meta analyses of sound studies showing proven causal relationships.
Appeal to Emotion
Appeal to Emotion
Manipulating an emotional response in place of a valid or compelling argument.
Luke didn’t want to eat chopped liver and brussel sprouts, but his father told him to think about the poor, starving children in a third world country who weren’t fortunate enough to have any food at all.
Tu Quoque
Tu Quoque
Avoiding having to engage with criticism by turning it back on the accuser - answering criticism with criticism.
The blue candidate accused the red candidate of committing the tu quoque fallacy. The red candidate responded by accusing the blue candidate of the same, after which ensued an hour of back and forth criticism with not much progress.
Burden of Proof
Burden of Proof
Saying that the burden of proof lies not with the person making the claim, but with someone else to disprove.
Bertrand declares that a teapot is, at this very moment, in orbit around the Sun between the Earth and Mars, and that because no one can prove him wrong his claim is therefore a valid one.
No True Scotsman
No True Scotsman
Making what could be called an appeal to purity as a way to dismiss relevant criticisms or flaws of an argument.
Angus declares that Scotsmen do not put sugar on their porridge, to which Lachlan points out that he is a Scotsman and puts sugar on his porridge. Furious, like a true Scot, Angus yells that no true Scotsman sugars his porridge.
The Texas Sharpshooter
The Texas Sharpshooter
Cherry-picking data clusters to suit an argument, or finding a pattern to fit a presumption.
The makers of Sugarette Candy Drinks points to research showing that of the five countries where Sugarette drinks sell the most units, three of them are in the top ten healthiest countries on earth, therefore Sugarette drinks are healthy.
The Fallacy Fallacy
The Fallacy Fallacy
Presuming that because a claim has been poorly argued, or a fallacy has been made, that it is necessarily wrong.
Recognising that Amanda had committed a fallacy in arguing that we should eat healthy food because a nutritionist said it was popular, Alyse said we should therefore eat bacon double cheeseburgers every day.
Personal Incredulity
Personal Incredulity
Saying that because one finds something difficult to understand that it’s therefore not true.
Kirk drew a picture of a fish and a human and with effusive disdain asked Richard if he really thought we were stupid enough to believe that a fish somehow turned into a human through just, like, random things happening over time.
Ambiguity
Ambiguity
Using double meanings or ambiguities of language to mislead or misrepresent the truth.
When the judge asked the defendant why he hadn’t paid his parking fines, he said that he shouldn’t have to pay them because the sign said ‘Fine for parking here’ and so he naturally presumed that it would be fine to park there.
Genetic
Genetic
Judging something good or bad on the basis of where it comes from, or from whom it comes.
Accused on the 6 o’clock news of corruption and taking bribes, the senator said that we should all be very wary of these things we hear in the media, because we all know how very unreliable the media can be.
The Volkswagen Beetle is an evil car because it was originally designed by Hitler’s army.
Middle Ground
Middle Ground
Saying that a compromise, or middle point, between two extremes is the truth.
Holly said that vaccinations caused autism in children, but her scientifically well-read friend Caleb said that this claim had been debunked and proven false. Their friend Alice offered a compromise that vaccinations cause some autism.
Hasty Generalization
Hasty Generalization
This is a conclusion based on insufficient or biased evidence. In other words, you are rushing to a conclusion before you have all of the relevant facts.
Even though it’s only the first day, I can tell this is going to be a boring course.
Post Hoc Ergo Propter Hoc
Post Hoc Ergo Propter Hoc
This is a conclusion that assumed that if ‘A’ occurred after ‘B’ then ‘B’ must have caused ‘A’.
I drank bottled water and now I am sick, so the water must have made me sick.
Circular Argument
Circular Argument
This restated the argument rather than actually proving it.
George Bush is a good communicator because he speaks effectively.
Ad Populum
Ad Populum
This is an emotional appeal that speak to positive (such as patriotism, religion, democracy) or negative (such as terrorism or fascism) concepts rather than the real issue at hand.
If you were a true American you would support the rights of people to choose whatever vehicle they want.
Red Herring
Red Herring
This is a diversionary tactic that avoids the key issues, often by avoiding opposing arguments rather than addressing them.
The level of mercury in seafood may be unsafe but what will fishers do to support their families?
Moral Equivalence
Moral Equivalence
This fallacy compares minor misdeeds with major atrocities.
That parking attendant who gave me a ticket is as bad as Hitler.
A Priori Argument
A Priori Argument
Also, “Rationalization.” Starting with a given, pre-set dogma, doctrine, “fact” or conclusion and then searching for any reasonable or reasonable-sounding argument in order to rationalize, defend or justify it. Certain religious fundamentalists are proud to use this fallacy as their primary method of “reasoning” and do not hesitate to say so.
Ad Hominem Argument
Ad Hominem Argument
Also, “Personal attack,” “Poisoning the well.” The fallacy of attempting to refute an argument by attacking the opposition’s personal character or reputation, using a corrupted negative argument from ethos.
E.g., “He’s so evil that you can’t believe anything he says.” See also “Guilt by Association.” Also applies to cases where valid opposing evidence and arguments are brushed aside without comment or consideration, as simply not worth arguing about, because of the lack of power or status of the person making the argument.
Appeal to Closure
Appeal to Closure
The contemporary fallacy that an argument, standpoint, action or conclusion must be accepted, no matter how questionable, or else the point will remain unsettled, which is unthinkable, and those affected will be denied “closure.” This refuses to recognize the truth that some points will indeed remain unsettled, perhaps forever.
E.g., “Society would be protected, crime would be deterred and justice served if we sentence you to life without parole, but we need to execute you in order to provide some sense of closure.”
See also “Argument from Ignorance,” “Argument from Consequences.”
Appeal to Heaven
Appeal to Heaven
(also Deus Vult, Gott mit Uns, Manifest Destiny, American Exceptionalism, the Special Covenant). An extremely dangerous fallacy (a deluded argument from ethos) of asserting that God (or History, or a higher power) has ordered, supports or approves one’s own standpoint or actions so no further justification is required and no serious challenge is possible.
E.g., “God ordered me to kill my children,” or “We need to take away your land, since God [or Destiny, or Fate, or Heaven] has given it to us.”
A private individual who seriously asserts this fallacy risks ending up in a psychiatric ward, but groups or nations who do it are far too often taken seriously. This vicious fallacy has been the cause of endless bloodshed over history.
Appeal to Pity
Appeal to Pity
(also “Argumentum ad Miserecordiam”). The fallacy of urging an audience to “root for the underdog” regardless of the issues at hand
E.g., “Those poor, cute little squeaky mice are being gobbled up by mean, nasty cats that are ten times their size!”
A corrupt argument from pathos. See also Playing to Emotions.
Appeal to Tradition
Appeal to Tradition
(also “If it ain’t broke, don’t fix it”). The fallacy that a standpoint, situation or action is right, proper and correct simply because it has “always” been that way, because people have “always” thought that way, or because it continues to serve one particular group very well. A corrupted argument from ethos (that of past generations).
E.g., “In America, women have always been paid less, so let’s not mess with long-standing tradition.”
The counterpart of this is “The Appeal to Novelty,” e.g., “It’s NEW, and [therefore it must be] improved!”
Argument from Consequences
Argument from Consequences
The major fallacy of arguing that something cannot be true because if it were the consequences would be unacceptable.
E.g., “Global climate change cannot be caused by human burning of fossil fuels, because if it were, switching to non-polluting energy sources would bankrupt American industry,” or “Doctor, that’s wrong! I can’t have terminal cancer, because if I did that’d mean that I won’t live to see my kids get married!”
Sources
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http: //utminers.utep.edu/omwilliamson/ENGL1311/fallacies.htm
https: //owl.english.purdue.edu/owl/resource/659/03/