Fallacies and Biases Flashcards
(664 cards)
What is the appeal to probability?
Taking something for granted because it would probably or possibly be the case.
What is the argument from fallacy (fallacy fallacy)?
Assuming that if an argument for a conclusion is fallacious, then the conclusion itself is false.
Define base rate fallacy.
This fallacy happens when we ignore how rare something is and rely only on specific details (like test accuracy), leading to a misleading conclusion. • example: A rare disease affects 1 in 10,000 people (0.01%). “The test says I have the disease, and it’s 99% accurate, so I must have a 99% chance of having it!”
What is the conjunction fallacy?
Assuming an outcome satisfying multiple conditions is more probable than an outcome satisfying just one of them.
What does non sequitur fallacy mean?
When the conclusion does not logically follow the premise.
Describe the masked-man fallacy.
If you replace the same names in a true sentence, the sentence will still be true. (example: “The old ‘Department Managers’ were ineffective, so we’re replacing them with ‘Team Coordinators’ to create a more agile structure.”)
What is affirming a disjunct?
This fallacy occurs when an argument assumes that because one of two options is true, the other must be false—even though both could be true simultaneously. Example: “We’ve transitioned to a self-managed team structure, so we no longer need to invest in leadership training.”
Fill in the blank: The fallacy of denying the antecedent assumes the consequent is false because the _______ is false.
[antecedent]
What is the existential fallacy?
The Existential Fallacy occurs when an argument assumes that because a category or rule exists, at least one actual instance of it must also exist—even when there’s no evidence for that. Example: “We’ve removed departmental silos and implemented open workspaces, so now employees will naturally collaborate across teams.”A structure that enables collaboration doesn’t guarantee collaboration will actually happen.
Define affirmative conclusion from a negative premise.
If you say something is not one thing and another thing is not something else, you can’t suddenly prove that something is true.
- No dogs are cats. (Negative statement)
- Some cats are not friendly. (Negative statement)
- Therefore, some dogs are friendly. (Affirmative conclusion—wrong!)
What is the fallacy of exclusive premises?
If both statements in an argument say what isn’t true, there’s no way to reach a solid conclusion about what is true.
I don’t own a bike, and my friend doesn’t have a car—so I must have a skateboard.”
What does the fallacy of four terms refer to?
The fallacy of four terms happens when a logical argument mistakenly uses more than three terms, making the reasoning invalid. In a proper syllogism (a logical argument with two premises and a conclusion), there should only be three terms that connect correctly.
Example of the Fallacy of Four Terms:
1. All dogs are animals.
2. All cats are mammals.
3. Therefore, all dogs are mammals. ❌ (Incorrect conclusion)
What is illicit major?
a conclusion says “All” about a group, but the argument never actually proves that, it’s a mistake.
Example:
1. All dogs are mammals. (True statement)
2. No cats are dogs. (True statement)
3. Therefore, no cats are mammals. (False conclusion!)
The mistake here is assuming that because dogs are mammals, only dogs can be mammals. The argument wrongly jumps to an all-or-nothing conclusion about a bigger group than the premises actually support.
What does illicit minor mean?
If the conclusion says “All” about a group, but the premise never actually supports that, it’s a mistake.
Example:
1. All cats are animals. (True statement)
2. Some animals are not dogs. (True statement)
3. Therefore, all cats are not dogs. (False conclusion!)
The mistake here is assuming that some animals not being dogs means all cats are not dogs in a way that makes a logical conclusion. However, the structure of the argument is incorrect, making it an illicit minor fallacy
What is the negative conclusion from affirmative premises fallacy?
A categorical syllogism with a negative conclusion but affirmative premises.
- All senior managers have leadership experience. (Affirmative)
- David has leadership experience. (Affirmative)
- Therefore, David cannot be a senior manager. (Negative Conclusion)
What is the fallacy of the undistributed middle?
If two things share a trait, it doesn’t mean they are the same.
Example:
1. All dogs are animals.
2. All cats are animals.
3. Therefore, all dogs are cats. (Wrong conclusion!)
Define modal fallacy.
Just because something can happen doesn’t mean it must happen.
Example:
1. It is possible that I will win the lottery.
2. Therefore, I will win the lottery. (Wrong conclusion!)
The mistake here is assuming that because something can happen, it must happen. The same mistake can happen in reverse, assuming that if something isn’t always true, it must never be true.
What is the modal scope fallacy?
Mistakenly claims something is only possibly true when it’s actually necessarily true.
Premise 1: Necessarily, if an employee is promoted, they must have strong leadership skills. • Premise 2: Blake was promoted. • Conclusion: Necessarily, Blake has strong leadership skills
What does the argument from incredulity entail?
Assuming something must be false because it is difficult to imagine as true.
What is the argument to moderation fallacy?
Assuming a compromise between two positions is always correct.
Fill in the blank: The continuum fallacy is also known as the _______.
[sorites fallacy]
What is the suppressed correlative fallacy?
someone redefines a concept in a way that makes its opposite impossible, effectively removing any real distinction.
Everyone is strong because even a weak person has some strength.”
Define definist fallacy.
Defining a term in a biased manner to make an argument difficult to refute.
“Any wage that is not determined through collective bargaining is exploitation.”
Why This Is a Definist Fallacy:
• The union redefines “exploitation” to mean any wage not set by a union contract, rather than the broader economic or ethical meaning of exploitation (such as unfair labor practices or poverty wages).
• This excludes the possibility that a company might offer fair, competitive wages without a union.
• It frames the company as automatically unethical, even if the wages are in line with market rates or better than industry standards.
What does divine fallacy refer to?
Assuming something phenomenal must be due to divine, alien, or paranormal forces.