preptest 73, logical reasoning 2, question 25
summary
the content delves into the analysis of a flaw question, focusing on identifying the logical misstep in an argument regarding roberta's mood based on her actions and conditions.
- a flaw question requires understanding the argument's conclusion and evidence, aiming to identify what makes the argument flawed.
- the argument concludes roberta is irritable based on evidence that is insufficient to prove irritability, only tiredness.
- the core issue lies in a sufficiency and necessity problem, where the argument mistakenly treats a necessary condition (tiredness) as a sufficient condition for irritability.
- answer choices are analyzed to pinpoint the exact nature of the flaw, concluding that the argument confuses necessary and sufficient conditions.
- the correct answer (e) identifies the argument's error in assuming tiredness as a sufficient condition to prove irritability.
chapters
00:00
understanding flaw questions
00:17
analyzing the argument
01:19
identifying the logical misstep
01:38
evaluating answer choices
