LOGIC
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AD HOMINEM
DOUBLE STANDARD
What is fallacy???
HASTY GENERALIZATION
FALSE DICHOTOMY
BEGGING THE QUESTION
RED HERRING
EQUIVOCATION
POST HOC (FALSE CAUSE)
SLIPPERY SLOPE
MISSING THE POINT
WEAK ANALOGY
APPEARL TO PITY
APPEARL TO IGNORANCE
APPEARL TO AUTHORITY
STRAW MAN
Fallacies can be deceptive because they often seem logical or persuasive, but they are actually flawed or misleading in some way.
Sometimes hard to evaluate whether an argument is fallacious
Fallacy is a type of mistake in reasoning or argumentation that renders an argument invalid or unsound.
An argument might be very weak, somewhat weak, somewhat strong, or very strong. An argument that has several stages or parts might have some strong sections and some weak ones.
- It refers to a type of logical fallacy where an argument attacks the character, personal attributes, or circumstances of an individual making an argument rather than addressing the substance or merits of their argument.
- In essence, it involves a diversionary tactic where the focus is shifted away from the argument itself and onto the person making the argument.
It's important to recognize ad hominem arguments in discussions and debates and to respond by focusing on the substance of the argument rather than engaging in personal attacks.
"Ad hominem" is a Latin phrase that translates to "to the person" in English
Double standards can manifest in various aspect of life: gender, age, ethnicity and race, social class, religions and beliefs, political affiliation,..
Double standards are generally seen as unfair and unjust because they often lead to discrimination, bias, and unequal treatment.
Used to describe a situation where different rules, principles, or expectations are applied to different groups or individuals, even when their circumstances or actions are similar. In other words, it involves treating one group or person more favorably or less favorably than another in similar situations, often due to bias, prejudice, or inconsistency in judgment.
ex: You meet a few people from a certain town who are unfriendly.
You conclude that all people from that town must be unfriendly.
Hasty generalizations can lead to unfair stereotypes, biased judgments, and incorrect conclusions because they do not account for the diversity and complexity within groups or situations.
Is a logical fallacy that occurs when someone draws a broad conclusion based on insufficient or limited evidence. It involves making a general statement about a group, category, or situation based on a small or unrepresentative sample.
ex: if people are discussing the importance of environmental conservation, and someone starts talking about the design of recycling bins without addressing the broader environmental issues
- Means that someone is not engaging with the heart of the matter or is diverting attention away from the primary topic or concern.
- It often implies a lack of comprehension or an inability to grasp the significance of the central issue at hand.
- Is an idiomatic expression that describes a situation where someone fails to understand or address the main or essential issue of a discussion, argument, or situation.
- Instead of grasping the central or crucial aspect, they focus on something less important, irrelevant, or tangential.
ex: The rooster crowed.
Then, the sun rose.
- To avoid the post hoc fallacy, it's essential to critically evaluate whether there is a legitimate causal connection between two events and to consider other possible explanations or factors that might contribute to the observed outcome.
- Is a Latin phrase that means "after this" or "afterward"
- This fallacy occurs when someone assumes that because one event happened after another, the first event must have caused the second event.
ex:
- If we allow students to use smartphones in the classroom, they will become distracted.
- If they become distracted, their grades will drop.
- If their grades drop, they won't get into good colleges.
- If they don't get into good colleges, they won't have successful careers.
- Therefore, allowing smartphones in the classroom will ruin their future prospects.
Is a logical fallacy that occurs when someone argues that a relatively small first step or action will inevitably lead to a series of negative consequences, often with little or no evidence to support this chain of events.
In reality, many factors can influence outcomes, and not all actions lead to the worst possible results.
ex: People are like cars; both require regular maintenance to run smoothly.
=> Therefore, the conclusion that a well-maintained car and a healthy person will lead to success is not adequately supported.
To avoid the weak analogy fallacy, it's important to ensure that the comparison being made is relevant, valid, and strong enough to support the argument's conclusion.
Is a type of logical fallacy that occurs when an argument relies on an analogy that is not strong or relevant enough to support the conclusion being drawn.
In other words, it involves comparing two things that are not sufficiently similar in relevant aspects to justify the conclusion.
ex: Dr. Smith, a famous physicist, says that eating five chocolate bars a day is healthy.
Therefore, we should all eat five chocolate bars a day for our health.
Relying solely on an authority's opinion, especially when they are not an expert in the relevant field, can lead to flawed and unsupported conclusions.
Is a type of logical fallacy in which someone tries to validate an argument or claim by relying on the opinion or testimony of an authority figure, expert, or well-known individual, rather than providing sound reasoning or evidence.
ex: "I know I plagiarized that paper, but please don't fail me.
My grandmother passed away last week, and I was too distraught to focus on my studies.
I really need to pass this class."
Evaluating arguments based on logic, evidence, and fairness rather than solely on emotional appeals helps ensure rational and fair decision-making.
Is a type of logical fallacy, also known as "argumentum ad misericordiam,"
where someone attempts to win an argument or gain support for their position by appealing to the emotions of pity, sympathy, or compassion, rather than relying on sound reasoning or evidence.
ex:
- Aliens must exist because no one has been able to prove that they don't.
- Ghosts can't exist because no one has been able to prove that they do.
To avoid the appeal to ignorance fallacy, it's important to base conclusions on available evidence, critical thinking, and logical reasoning rather than relying on the absence of evidence to support a particular claim.
Is a logical fallacy that occurs when someone argues that a claim is true because it hasn't been proven false or that it's false because it hasn't been proven true.
- Person A: "We should consider implementing stricter regulations on pollution from factories to reduce environmental harm."
- Person B: "Person A wants to shut down all factories and destroy the economy. We can't let that happen."
To avoid committing a straw man fallacy, it's important to accurately represent your opponent's argument and engage with the actual points they are making rather than creating a distorted version of it for easier refutation.
Constructive and respectful debate involves addressing the real issues at hand.
Is a type of logical fallacy that occurs when someone misrepresents or distorts their opponent's argument or position in a way that makes it easier to attack or refute.
ex:
Person A: "We need to address the rising crime rates in our city."
Person B: "Yes, but what about the fact that our neighboring city has even higher crime rates? We should be more concerned about their problems."
Identifying red herrings in arguments is important for critical thinking and effective communication because they can cloud the real issues and prevent productive discussions. It's essential to stay focused on the main topic and not be swayed by irrelevant distractions.
Is a rhetorical device or logical fallacy that is used to divert attention away from the real issue or argument at hand. It involves introducing a seemingly relevant, but ultimately irrelevant or distracting, piece of information or argument in order to mislead or confuse the audience.
The term "red herring" originates from a practice in the past of using strong-smelling smoked fish (red herring) to throw off scent-tracking hounds during a hunt.
False dichotomies can be used to manipulate or limit choices in discussions, debates, or decision-making processes. They are a form of black-and-white thinking that fails to acknowledge the complexity of real-world situations. Recognizing and avoiding false dichotomies is essential for critical thinking and reasoned discourse because they can lead to incomplete or misleading conclusions.
ex: Either you support every government policy without question, or you're an anarchist who wants chaos and lawlessness.
Also known as a "false dilemma" or "false binary", is a logical fallacy in which a situation is presented as if there are only two mutually exclusive options or possibilities when, in fact, there are more alternatives or nuances to consider.
This fallacy oversimplifies complex issues, often to make one of the two options seem more favorable or to force a decision between the two presented choices.
ex: "The Bible is the word of God because God wrote it, and we know God exists because the Bible tells us so."
To avoid begging the question, arguments should provide independent evidence or reasons to support their conclusions, rather than relying on those conclusions as premises.
Is a logical fallacy that occurs when an argument's premises assume the truth of the conclusion, rather than providing evidence or reasons to support the conclusion. In other words, it's a circular argument where the conclusion is restated in different words, but no new information or evidence is presented to support it.
This fallacy often goes unnoticed because it can be subtly disguised within a seemingly valid argument.
ex:
A feather is light.
What is light cannot be dark.
Therefore, a feather cannot be dark.
=> In this example, the word "light" is used with two different meanings: in the first premise, it refers to weight, while in the second premise, it refers to the absence of darkness. This switch in meaning makes the argument seem valid, but it's actually flawed because of the ambiguity in the use of the word "light."
Equivocation can be used deliberately to deceive or mislead, or it can occur unintentionally when there is confusion about the meaning of a word or phrase. To avoid equivocation in arguments, it's essential to ensure that the key terms or phrases maintain consistent meanings throughout the argument.
Is a type of logical fallacy that occurs when a word or phrase is used in an argument in multiple senses or meanings, leading to a misleading or false conclusion. Essentially, equivocation involves a switch in the meaning of a key term within an argument, which makes the argument appear valid when it is not.
- deductive argument, the premises entail the conclusion.
=> if the premises are all true, then the conclusion has to be true. - inductive argument, the premises probabilism the conclusion.
=> if the premises are all true, then the conclusion probably is true
Valid argument
- A valid argument is one where, if all the premises are true, then the conclusion must also be true. In other words, the conclusion logically follows from the premises.
- Even if the conclusion is false, if the argument is valid, it means that the premises, if true, would guarantee the truth of the conclusion.
- Validity is about the logical structure of the argument, not necessarily the truth of the premises or conclusion.
- ex:
Premise 1: All humans are mortal.
Premise 2: Socrates is a human.
Conclusion: Therefore, Socrates is mortal.
Invalid argument
- An invalid argument is one where the premises, even if they are true, do not logically guarantee the truth of the conclusion. In other words, it's possible for the premises to be true while the conclusion is false.
- Invalidity is also about the logical structure of the argument and whether the conclusion follows logically from the premises.
- ex:
Premise 1: All cats have fur.
Premise 2: My dog has fur.
Conclusion: Therefore, my dog is a cat.
I believe it is crucial to distinguish between strong and weak arguments. We outline each fallacy's definition and provide a few illustrations. According to the definition of a fallacy, there are formal fallacies that violate certain principles of logic as well as informal fallacies, which are typically expressed in the form of an apparent argument but really fail to support the conclusion.
chỉ trích cá nhân
tiêu chuẩn kép
đánh giá tổng quan dựa trên chi tiết
bỏ lỡ ý chính
A xuất hiện trước B nhưng A không thể là nguyên nhân của B
một chuỗi tụt dốc
so sánh sai khía cạnh, không liên quan
trình bày sai hoặc bóp méo sự thật của đối thủ
đúng vì chưa được chứng minh sai và ngược lại
thiên về cảm xúc, không lập luận, không chứng cứ xác thực
xác thực dựa vào một người có ảnh hưởng (thường k có chuyên môn)
đánh lừa
làm cho 2 lựa chọn nghe có vẻ thuận lợi hơn trong khi có nhiều lựa chọn
ngụy trang tinh vi trong 1 lập luận nghe có vẻ hợp lệ
chuyển đổi ý nghĩa của 1 từ hay câu để nghe có vẻ hợp lý