Bell-Ringer Logical Fallacies

A conclusion based on insufficient, incomplete, or biased information

• bandwagon

• hasty generalization

• circular reasoning

• mistaken causality

Tags

CCSS.RI.7.1

CCSS.RI.7.8

CCSS.RI.8.1

CCSS.RI.8.8

CCSS.RL.8.1

What is a fallacy?

• an argument that is won by an either/or choice

• a conclusion that is reached by circular reasoning

• an argument that is flawed by faulty logic

• a conclusion that is reached when there are no good solutions

Tags

CCSS.L.7.6

CCSS.L.8.6

CCSS.W.6.2D

CCSS.W.7.2D

CCSS.W.8.2D

The main reason we sometimes don't recognize faulty logic is:

• we don't care about possible options because our focus is to win

• we agree with the principle of the argument that is being made

• we don't care who wins or loses the argument

• there are only two options to choose from in an argument

Tags

CCSS.RI.6.1

CCSS.RI.6.8

CCSS.RI.7.1

CCSS.RI.8.8

CCSS.RL.7.1

Which is an example of Slippery Slope?

If you don't brush your teeth this morning...

• ...all of your teeth will fall out and no one will ever offer you a job.

• ...you will regret it halfway through the day.

• ...you will be sure to remember to brush them this evening.

Which is an example of Slippery Slope?

Football is dangerous! If you let your son play football...

• ... he might get a concussion from a hard tackle.

• ....he runs the risk of getting injured during a game or practice.

• ...he will suffer head injury after head injury, until he can no longer walk straight or spell his own name!

Tags

CCSS.RI.6.1

CCSS.RI.6.8

CCSS.RI.7.1

CCSS.RI.7.8

CCSS.RI.8.1

Which logical fallacy is shown in this example:

“If I let you use your phones for the last five minutes of class, you will start using them all the time… and eventually there won’t be one single student listening to the lesson!”

• Slippery Slope

• Overgeneralization

• Ad Populum

Tags

CCSS.RI.6.5

CCSS.RI.7.5

CCSS.RI.7.8

CCSS.RI.8.5

CCSS.RI.8.8

The red bicycle is red.

• circular logic

• red herring

• either/or

• straw man

Tags

CCSS.RI.6.1

CCSS.RI.6.8

CCSS.RI.7.1

CCSS.RI.7.8

CCSS.RL.8.1

Mother: It’s bedtime Jane Jane: Mom, how do ants feed their babies? Mother: Don’t know dear, close your eyes now. Jane: But mama, do ant babies cry when they’re hungry?

• straw man

• non sequitur

• red herring

• hasty generalization

Tags

CCSS.L.6.6

CCSS.L.8.6

CCSS.W.6.2D

CCSS.W.7.2D

CCSS.W.8.2D

We should stop using hairspray because it is snowing in New York.

• hasty generalization

• non sequitur

• ad hominem

• moral equivalence

Tags

CCSS.RI.6.1

CCSS.RI.6.8

CCSS.RI.7.8

CCSS.RI.8.1

CCSS.RI.8.8

It is warmer this year in Las Vegas as compared to last year; therefore, global warming is rapidly accelerating.

• slippery slope

• red herring

• circular reasoning

• hasty generalization

Tags

CCSS.RI.6.1

CCSS.RI.7.1

CCSS.RI.8.1

CCSS.RI.8.8

CCSS.RL.8.1