Fallacy

logical fallacy

An error in reasoning that renders an argument invalid

Appeal to Authority

Appeals to an authority to support a position, idea, argument, or course of action This fallacy happens when we misuse an authority. This misuse of authority can occur in a number of ways. We can cite only authorities — steering conveniently away from other testable and concrete evidence as if expert opinion is always correct. Or we can cite irrelevant authorities, poor authorities, or false authorities. Like many of the other fallacies in this list, the argumentum ad verecundiam ("argument from respect") can be hard to spot. It's tough to see, sometimes, because it is normally a good, responsible move to cite relevant authorities supporting your claim. It can't hurt. But if all you have are authorities, and everyone just has to "take their word for it" without any other evidence to show that those authorities are correct, then you have a problem. Often this fallacy refers to irrelevant authorities — like citing a foot doctor when trying to prove something about psychiatry; their expertise is in an irrelevant field. When citing authorities to make your case, you need to cite relevant authorities, but you also need to represent them correctly, and make sure their authority is legitimate. Suppose someone says, "I buy Hanes™ underwear because Michael Jordan says it's the best." Michael Jordan may be a spokesperson, but that doesn't make him a relevant authority when it comes to underwear. This is a fallacy of irrelevant authority.

Slippery Slope Fallacy

When a person's argument is just repeating what they already assumed beforehand, it's not arriving at any new conclusion. We call this a circular argument or circular reasoning. If someone says, "The Bible is true; it says so in the Bible"—that's a circular argument. They are assuming that the Bible only speaks truth, and so they trust it to truthfully report that it speaks the truth, because it says that it does. It is a claim using its own conclusion as its premise, and vice versa, in the form of "If A is true because B is true; B is true because A is true". Another example of circular reasoning is, "According to my brain, my brain is reliable." Well, yes, of course we would think our brains are in fact reliable if our brains are the one's telling us that our brains are reliable. Circular arguments are also called Petitio principii, meaning "Assuming the initial [thing]" (commonly mistranslated as "begging the question"). This fallacy is a kind of presumptuous argument where it only appears to be an argument. It's really just restating one's assumptions in a way that looks like an argument. You can recognize a circular argument when the conclusion also appears as one of the premises in the argument. Another way to explain circular arguments is that they start where they finish, and finish where they started. See if you can identify which of these is a circular argument.

Informal Fallacy

denotes an error in what you are saying, that is, the content of your argument. The ideas might be arranged correctly, but something you said isn't quite right. The content is wrong or off-kilter.

Causal Fallacy

the inappropriate assumption that one event is the cause of another when there is little evidence to connect the two events Sometimes we invest ourselves so thoroughly in a project that we're reluctant to ever abandon it, even when it turns out to be fruitless and futile. It's natural and usually not a fallacy to want to carry on with something we find important, not least because of all the resources we've put into it. However, this kind of thinking becomes a fallacy when we start to think that we should continue with a task or project because of all that we've put into it, without considering the future costs we're likely to incur by doing so. There may be a sense of accomplishment when finishing, and the project might have other values, but it's not enough to justify the cost invested in it. We are susceptible to this errant behavior when we crave that sense of completion or a sense of accomplishment

What is a Logical Fallacy?

A logical fallacy is an error in reasoning common enough to warrant a fancy name. Knowing how to spot and identify fallacies is a priceless skill. It can save you time, money, and personal dignity. There are two major categories of logical fallacies, which in turn break down into a wide range of types of fallacies, each with their own unique ways of trying to trick you into agreement.

Hasty Generalization

A hasty generalization is a general statement without sufficient evidence to support it. A hasty generalization is made out of a rush to have a conclusion, leading the arguer to commit some sort of illicit assumption, stereotyping, unwarranted conclusion, overstatement, or exaggeration. Normally we generalize without any problem; it is a necessary, regular part of language. We make general statements all the time: "I like going to the park," "Democrats disagree with Republicans," "It's faster to drive to work than to walk," or "Everyone mourned the loss of Harambe, the Gorilla." Hasty generalization may be the most common logical fallacy because there's no single agreed-upon measure for "sufficient" evidence.

Red Herring Fallacy

The "tu quoque," Latin for "you too," is also called the "appeal to hypocrisy" because it distracts from the argument by pointing out hypocrisy in the opponent. This tactic doesn't solve the problem, or prove one's point, because even hypocrites can tell the truth. Focusing on the other person's hypocrisy is a diversionary tactic. In this way, using the tu quoque typically deflects criticism away from yourself by accusing the other person of the same problem or something comparable. If Jack says, "Maybe I committed a little adultery, but so did you Jason!" Jack is trying to diminish his responsibility or defend his actions by distributing blame to other people. But no one else's guilt excuses his own guilt. No matter who else is guilty, Jack is still an adulterer. The tu quoque fallacy is an attempt to divert blame, but it really only distracts from the initial problem. To be clear, however, it isn't a fallacy to simply point out hypocrisy where it occurs. For example, Jack may say, "yes, I committed adultery. Jill committed adultery. Lots of us did, but I'm still responsible for my mistakes." In this example, Jack isn't defending himself or excusing his behavior. He's admitting his part within a larger problem. The hypocrisy claim becomes a tu quoque fallacy only when the arguer uses some (apparent) hypocrisy to neutralize criticism and distract from the issue. the use of irrelevant material to divert attention

Appeal to Ignorance (argumentum ad ignorantiam)

This fallacy has a few other names: "black-and-white fallacy," "either-or fallacy," "false dichotomy," and "bifurcation fallacy." This line of reasoning fails by limiting the options to two when there are in fact more options to choose from. Sometimes the choices are between one thing, the other thing, or both things together (they don't exclude each other). Sometimes there is a whole range of options, three, four, five, or a hundred and forty-five. However it may happen, the false dichotomy fallacy errs by oversimplifying the range of options. Dilemma-based arguments are only fallacious when, in fact, there are more than the stated options. It's not a fallacy however if there really are only two options. For example, "either Led Zeppelin is the greatest band of all time, or they are not." That's a true dilemma, since there really are only two options there: A or non-A. It would be fallacious however to say, "There are only two kinds of people in the world: people who love Led Zeppelin, and people who hate music." Some people are indifferent about that music. Some sort of like it, or sort of dislike it, but don't have strong feelings either way. Dilemma-based arguments are only fallacious when, in fact, there are more than the stated options. The false dilemma fallacy is often a manipulative tool designed to polarize the audience, heroicizing one side and demonizing the other. It's common in political discourse as a way of strong-arming the public into supporting controversial legislation or policies.

Equivocation

Argumentum ad misericordiam is Latin for "argument to compassion." Like the ad hominem fallacy above, it is a fallacy of relevance. Personal attacks, and emotional appeals, aren't strictly relevant to whether something is true or false. In this case, the fallacy appeals to the compassion and emotional sensitivity of others when these factors are not strictly relevant to the argument. Appeals to pity often appear as emotional manipulation. For example, "How can you eat that innocent little carrot? He was plucked from his home in the ground at a young age and violently skinned, chemically treated, and packaged, and shipped to your local grocer, and now you are going to eat him into oblivion when he did nothing to you. You really should reconsider what you put into your body." Obviously, this characterization of carrot-eating is plying the emotions by personifying a baby carrot like it's a conscious animal, or, well, a baby. By the time the conclusion appears, it's not well-supported. If you are to be logically persuaded to agree that "you should reconsider what you put into your body," then it would have been better evidence to hear about unethical farming practices or unfair trading practices such as slave labor, toxic runoffs from fields, and so on. Truth and falsity aren't emotional categories, they are factual categories. They deal in what is and is not, regardless of how one feels about the matter. Another way to say it is that this fallacy happens when we mistake feelings for facts. Our feelings aren't disciplined truth-detectors unless we've trained them that way. So, as a general rule, it's problematic to treat emotions as if they were (by themselves) infallible proof that something is true or false. Children may be scared of the dark for fear there are monsters under their bed, but that's hardly proof of monsters. Truth and falsity aren't emotional categories, they are factual categories.

Strawman Argument

It's much easier to defeat your opponent's argument when it's made of straw. The Strawman argument is aptly named after a harmless, lifeless, scarecrow. In the strawman argument, someone attacks a position the opponent doesn't really hold. Instead of contending with the actual argument, he or she attacks the equivalent of a lifeless bundle of straw, an easily defeated effigy, which the opponent never intended upon defending anyway. The strawman argument is a cheap and easy way to make one's position look stronger than it is. Using this fallacy, opposing views are characterized as "non-starters," lifeless, truthless, and wholly unreliable. By comparison, one's own position will look better for it. You can imagine how strawman arguments and ad hominem fallacies can occur together, demonizing opponents and discrediting their views. With the strawman argument, someone attacks a position the opponent doesn't really hold. This fallacy can be unethical if it's done on purpose, deliberately mischaracterizing the opponent's position for the sake of deceiving others. But often the strawman argument is accidental, because the offender doesn't realize the are oversimplifying a nuanced position, or misrepresenting a narrow, cautious claim as if it were broad and foolhardy.

Ad Hominem Fallacy

More specifically, the ad hominem is a fallacy of relevance where someone rejects or criticizes another person's view on the basis of personal characteristics, background, physical appearance, or other features irrelevant to the argument at issue. Ad hominem is an insult used as if it were an argument or evidence in support of a conclusion. is used the most in politics

fallacy

a mistaken belief, especially one based on unsound argument is an argument of type that is generally recognized to be bad

Bandwagon Fallacy

error of assuming that a claim is correct just because many people believe it

Logical Fallacies

methods of pseudo-reasoning that may occur accidentally or may be intentionally contrived to lend plausibility to an unsound argument. that are not correct

fallacies

only apply to arguments in their "standard form" with all missing or assumed premises made explicit

logical fallacy

potential vulnerabilities or weaknesses in an argument

Formal Fallacy

s a breakdown in how you say something. The ideas are somehow sequenced incorrectly. Their form is wrong, rendering the argument as noise and nonsense.