Fallacies / तर्कदोष

Fallacy reasoning में एक error है जो argument को invalid, weak, या unconvincing बनाता है।

Two Main Types:

• Formal Fallacies — रूपगत तर्कदोष: Errors in the logical structure of a deductive argument.
• Informal Fallacies — अनौपचारिक तर्कदोष: Errors in content, language, or context rather than structure.

Formal fallacies occur when there is a structural flaw in a deductive argument — the conclusion does not logically follow from the premises.

• Undistributed Middle
• Illicit Major
• Illicit Minor
• Exclusive Premises
• Negative/Affirmative Conclusion Errors
• Two Particular Premises

The middle term (M) is not distributed in either premise.

Example:

• All dogs (M) are animals (P).
• All cats (S) are animals (M).
• Therefore, all cats (S) are dogs (P).

Analysis: M is the predicate in both premises → not distributed in either → invalid.

The Major Term (P) is distributed in the conclusion but not distributed in the major premise.

Example:

• All cats are animals. (Major Premise — P=animals, not distributed)
• No dogs are cats. (Minor Premise)
• Therefore, no dogs are animals. (Conclusion — P=animals, distributed)

The Minor Term (S) is distributed in the conclusion but not distributed in the minor premise.

Example:

• All cats are animals. (Major Premise)
• All cats are mammals. (Minor Premise — S=cats, distributed)
• Therefore, all mammals are animals. (Conclusion — S=mammals, distributed but not in minor premise)

Both premises are negative (E or O).

Example:

• No cats are dogs. (E)
• No animals are cats. (E)
• Therefore, no animals are dogs. (Invalid)

• If either premise is negative, conclusion must be negative.
• If both premises are affirmative, conclusion must be affirmative.

Example (Negative premise → Affirmative conclusion):

• No cats are dogs. (Negative)
• All animals are cats. (Affirmative)
• Therefore, all animals are dogs. (Affirmative — ❌ Invalid)

Both premises are particular (I or O).

Example:

• Some cats are animals. (I)
• Some dogs are cats. (I)
• Therefore, some dogs are animals. (Invalid)

Conditional fallacies occur in arguments with if...then (conditional) statements.

• Affirming the Consequent
• Denying the Antecedent

Structure:

• If it rains (P), then the ground is wet (Q).
• The ground is wet (Q).
• Therefore, it rained (P).

Analysis: The ground could be wet for other reasons (sprinkler, etc.). This is invalid.

Structure:

• If it rains (P), then the ground is wet (Q).
• It does not rain (P is false).
• Therefore, the ground is not wet (Q is false).

Analysis: The ground could still be wet (sprinkler, etc.). This is invalid.

Informal fallacies occur due to content, language, ambiguity, or emotional manipulation rather than logical structure.

• Relevance Fallacies — Ad Hominem, Appeal to Authority, Ad Populum, Ad Misericordiam, Ad Baculum, Ad Ignorantiam, Straw Man, Red Herring
• Inductive Fallacies — Hasty Generalisation, False Cause/Post Hoc, Slippery Slope
• Presumption Fallacies — False Dilemma, Begging the Question, Circular Reasoning
• Ambiguity Fallacies — Equivocation, Amphiboly, Composition, Division

Attacking the person making the argument rather than the argument itself.

Example:

• "You can't trust his argument about climate change because he drives a big car."
• Whether he drives a big car is irrelevant to the truth of his argument.

Appealing to an authority figure who is not an expert in the relevant field.

Example:

• "This medicine must be good because a famous actor endorsed it."
• An actor is not a medical expert.

Claiming something is true because many people believe it or it is popular.

Example:

• "Everyone knows that the earth is flat, so it must be true."
• Popular belief does not make something true.

Appealing to pity or sympathy to support a conclusion.

Example:

• "You should give me the job because I have a family to support."
• While it may be sad, it does not prove you are qualified.

Using threats or fear to make someone accept a conclusion.

Example:

• "If you don't agree with me, I will make your life difficult."
• This does not make the argument true.

Claiming something is true because it hasn't been proven false, or false because it hasn't been proven true.

Example:

• "No one has proven that ghosts don't exist, so they must exist."
• Lack of evidence against something does not prove it.

Misrepresenting or oversimplifying someone's argument to make it easier to attack.

Example:

• Person A: "We should invest more in education."
• Person B: "So you want to ignore healthcare and infrastructure?"
• Person B misrepresents Person A's argument.

Introducing irrelevant information to distract from the main issue.

Example:

• When asked about rising crime rates, a politician starts talking about the economy.
• This is irrelevant to the crime rate question.

Drawing a general conclusion from a small or unrepresentative sample.

Example:

• "I met two rude people from that city, so everyone there is rude."
• Two people are not enough to represent a whole city.

Assuming that because one event happened after another, the first event caused the second.

Example:

• "I wore my lucky shirt and we won the game, so the shirt caused the win."
• Correlation/timing does not equal causation.

Arguing that one action will inevitably lead to a chain of negative events without evidence.

Example:

• "If we allow students to use calculators, soon they will forget how to do basic math, and eventually they won't be able to think at all."
• This is an unsupported chain of events.

Presenting only two options when there are actually more.

Example:

• "You are either with us or against us."
• There are many possible positions in between.

Assuming what you are trying to prove. The conclusion is already assumed in the premises.

Example:

• "The book is true because it says it is true."
• The conclusion is assumed in the premise.

Similar to begging the question — the conclusion is used to support the premises in a circle.

Example:

• "I am trustworthy because I always tell the truth. I always tell the truth because I am trustworthy."
• This reasoning goes in a circle.

Using the same word in different meanings within an argument.

Example:

• "A feather is light. What is light cannot be dark. Therefore, a feather cannot be dark."
• "Light" means weight in the first use and brightness in the second.

Ambiguous sentence structure leading to multiple interpretations.

Example:

• "I saw the man with the telescope."
• Did I use the telescope to see the man, or did the man have the telescope?

Assuming that what is true of the parts is also true of the whole.

Example:

• "Each player on the team is excellent, so the team must be excellent."
• Individual excellence does not guarantee team success.

Assuming that what is true of the whole is also true of the parts.

Example:

• "The team is the best in the league, so every player on the team must be the best in the league."
• A team can be great without every player being individually great.

• Trap 1: Ad Hominem = only personal insults → ❌ It includes attacking character, motives, or circumstances.
• Trap 2: Appeal to Authority = always fallacious → ❌ It's only fallacious when the authority is not relevant or credible.
• Trap 3: Ad Populum = majority rule → ❌ Popularity does not prove truth.
• Trap 4: Post Hoc = causation → ❌ Temporal sequence does not prove causation.
• Trap 5: Slippery Slope = always fallacious → ❌ It is fallacious only when the chain of events is unsupported.
• Trap 6: False Dilemma = only two options → ❌ Usually more than two options exist.
• Trap 7: Equivocation = same word → ❌ Same word with different meanings.

"You can't trust his argument about climate change because he is not a scientist." This is an example of:

• A. Ad Hominem
• B. Appeal to Authority
• C. Straw Man
• D. Ad Populum

Explanation: Attacking the person (he is not a scientist) instead of addressing the argument itself.

"Everyone is buying this product, so it must be good." This is an example of:

• A. Ad Hominem
• B. Ad Populum
• C. False Dilemma
• D. Begging the Question

Explanation: Appealing to popularity to prove quality — Ad Populum.

All cats are animals. All dogs are animals. Therefore, all dogs are cats. This commits which fallacy?

• A. Undistributed Middle
• B. Illicit Major
• C. Exclusive Premises
• D. Affirming Consequent

Explanation: Middle term "animals" is not distributed in either premise.

"If you don't support this policy, you are unpatriotic." This is an example of:

• A. False Dilemma
• B. Ad Baculum
• C. Red Herring
• D. Slippery Slope

Explanation: Presents only two options — support policy or be unpatriotic — ignoring other possibilities.

"I wore my lucky socks and we won the game, so the socks caused the win." This is an example of:

• A. Hasty Generalisation
• B. False Cause/Post Hoc
• C. Slippery Slope
• D. Equivocation

Explanation: Assuming causation because one event happened after another.

Formal Fallacies:

• Undistributed Middle, Illicit Major, Illicit Minor, Exclusive Premises, Negative/Affirmative Conclusion Errors, Two Particular Premises

Conditional Fallacies:

• Affirming Consequent, Denying Antecedent

Informal Fallacies:

• Relevance: Ad Hominem, Appeal to Authority, Ad Populum, Ad Misericordiam, Ad Baculum, Ad Ignorantiam, Straw Man, Red Herring
• Inductive: Hasty Generalisation, False Cause/Post Hoc, Slippery Slope
• Presumption: False Dilemma, Begging the Question, Circular Reasoning
• Ambiguity: Equivocation, Amphiboly, Composition, Division

Exam Formula:

UGC NET में Fallacies के questions recognition, classification, और application पर based होते हैं।