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Grade 9 Logical Fallacies Worksheet with Answers

Grade 9 (US) · Year 10 (UK) · Class 9 (India) · English

Unit 5: Reading Informational TextEvaluating ArgumentsCCSS RI.9-10.8

Spotting faulty reasoning such as bandwagon, ad hominem, straw man and slippery slope. This free high school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Logical Fallacies

Grade 9 · English

Score___ / 12

Name

Class

Date

Learning goal: Evaluating Arguments · CCSS RI.9-10.8

Directions: This worksheet has 2 parts. Read the instructions at the start of each part.

RememberLogical fallacies

Bandwagoneveryone does itAd hominemattacks the personStraw mantwists the other argumentSlippery slopeone step → disasterFalse choiceonly two options givenHasty generalizationtoo little evidence
Part A

Name the fallacy:

  1. 1

    The book is true because the book says it is true.

  2. 2

    This has always been done this way, so it must be right.

  3. 3

    Everyone has this phone, so you should buy it.

  4. 4

    Why worry about pollution when there are so many other problems?

  5. 5

    A famous actor says this vitamin works, so it must.

  6. 6

    I met two rude tourists, so all tourists are rude.

  7. 7

    I wore my lucky socks and we won, so the socks made us win.

  8. 8

    Either you support this plan or you hate our town.

  9. 9

    She wants shorter homework, so she thinks students shouldn't learn at all.

  10. 10

    You can't trust his idea — he's always late.

  11. 11

    If we allow phones in class, soon nobody will learn anything.

Part B

Answer each question. Use full sentences where you can.

  1. 12

    Why do writers need to avoid fallacies?

★ Challenge corner for fast finishers

The more you take, the more you leave behind. What are they?

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/english/9/fallacies

Answer key (click to show)
  1. 1.circular reasoning
  2. 2.appeal to tradition
  3. 3.bandwagon
  4. 4.red herring
  5. 5.appeal to (false) authority
  6. 6.hasty generalization
  7. 7.post hoc (false cause)
  8. 8.false dilemma (either/or)
  9. 9.straw man
  10. 10.ad hominem
  11. 11.slippery slope
  12. 12.fallacies make arguments illogical and less convincing
  13. ★footsteps (challenge corner)

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