PrepTest 73, Section 3, Question 25
Roberta is irritable only when she is tired, and loses things only when she is tired. Since she has been yawning all day, and has just lost her keys, she is almost certainly irritable.
Roberta is irritable only when she is tired, and loses things only when she is tired. Since she has been yawning all day, and has just lost her keys, she is almost certainly irritable.
Roberta is irritable only when she is tired, and loses things only when she is tired. Since she has been yawning all day, and has just lost her keys, she is almost certainly irritable.
Roberta is irritable only when she is tired, and loses things only when she is tired. Since she has been yawning all day, and has just lost her keys, she is almost certainly irritable.
The reasoning above is flawed in that it
infers from a correlation between tiredness and yawning that tiredness causes yawning
assumes the conclusion that it sets out to prove
generalizes on the basis of a single instance
takes a necessary condition for Roberta's losing things to be a sufficient condition
takes a necessary condition for Roberta's being irritable to be a sufficient condition
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