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BIG-Bench Hard / It is not always easy to see who is related to whom -- and in which ways. The…

Problem

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input

"It is not always easy to see who is related to whom -- and in which ways. The following argument pertains to this question: First, whoever is an uncle of Owen is not a nephew of Gene. Second, whoever is both a nephew of Ignacio and a brother of David is a schoolmate of Steve or an uncle of Owen.third, everyone who is a schoolmate of Steve is a nephew of Gene, too. We may conclude: Every brother of David who is a nephew of Ignacio is not a nephew of Gene."
Is the argument, given the explicitly stated premises, deductively valid or invalid?
Options:
- valid 
- invalid

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Source and history

task_id
9dcf2bf4-11c0-5c82-a27d-b3c538f911d2
task_key
formal~5ffallacies--main--9dcf2bf4-11c0-5c82-a27d-b3c538f911d2
task_revision_id
1
config / split
formal_fallacies / main

Official source

initial import