Logical Fallacies

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20 Terms

1

Ad hominem/tu quoque

Attacking someone for who they are, and not the argument

Ad hominem = “To the man”

  • Your argument can't be right because you're no good.

Tu quoque = “You, too”

  • Your argument can't be right because you're a hypocrite.

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2

Red Herring

A distraction

If you want proof, I'll give you proof by...changing the subject.

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3

Non-Sequitur

Non sequitur = not in sequence

  • The conclusion does not seem to follow from the premises.

  • ‘A’ is true; therefore, ‘C’

  • Connect the dots with some missing explanation/facts.

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4

Bandwagon/ad populum

Ad populum = “To the people”

  • My opinion is more popular, so it’s correct

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5

Appeal to Authority

I’m right because I have more authority than you.

  • I am your parent; therefore, I’m right

  • I am your boss; therefore I’m right

  • I am the expert; therefore I’m right

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6

Appeal to Tradition

This thing is right because it’s always been this way.

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7

Slippery Slope

Slippery Slope = One misstep will lead to disastrous consequences

  • If we let A happen, B will happen, the C will happen, and then D will happen... So let’s not do A.

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8

Hypotheticals/Speculation

When the argument hinges on hypothetical future events.

“What if”

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9

Post hoc/false cause

Post hoc ergo propter hoc = It happened after; therefore, it happened because

  • Because something good or bad happened after something, that something caused the good or bad thing to happen.

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10

Hasty Generalization

Hasty Generalization = Stereotyping

Some of that type are a certain way; therefore, in general, all of that type are that way.

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11

Scapegoating

Blaming a single person or a single group for the issues or problems being faced.

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12

False dichotomy/black and white

False Dichotomy = Falsely into two

  • There are only two choices here; choose one.

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13

Anecdotal Evidence

Anecdotes = Brief stories

  • Using personal stories to prove a point rather than statistical evidence.

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14

Guilt by Association

His argument can’t be right because he’s a member of _________.

That idea can’t be right because it’s affiliated with _________.

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15

Equivocation

Misrepresenting the common meaning of words.

Manipulating the meaning of words to wriggle out of an argument.

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16

Hyperbole

Misrepresenting an argument by exaggerating the claim or evidence.

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17

Straw Man

Straw man = A weak or fragile representation of something else.

  • An argument that sets up the opposing argument in a way that makes it easier to knock down.

  • Putting words into the mouth of your opponent.

    • “So what he’s saying is…”

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18

Circular Reasoning

Circular reasoning = A claim where the reasoning is the claim, itself.

  • The A and the B in ABCDE are the same

    • You should believe this because it should be believed.

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19

Deliberate Ignorance

I don’t believe your claims, and I don’t really want to hear your argument or evidence.

With this fallacy, an argument can’t take place.

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20

Burden of Proof

Burden of proof: The person who makes the claim has the burden (responsibility) of proving that his/her point is correct.

Appeal to Ignorance: It’s natural to think a double-negative equals a positive, but in arguments, it doesn’t. Appeal to ignorance says that if you can’t prove something wrong, it’s right.

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