Unit 8 · Detecting Reasoning Errors
Jake and Robert — Spot the Reasoning Flaw
Lesson 5 of 34
About this lesson
Jake is going to the party; Robert is not. Natalie concludes Robert didn't do his homework. Daniel concludes Jake did. One of them has made a classic logic error — can you spot who?
Chapters
Question
Jake and Robert are brothers. Their parents have told them that they will not be allowed to go to the party tonight if they have not completed their homework.
Natalie: "Jake is coming to the party, but Robert is not, so Robert can't have completed his homework."
Daniel: "Jake must have completed his homework."
If the information in the box is true, whose reasoning is correct?
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