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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: To start with, no uncle of Arturo is a stepbrother of Edwin or a close friend of Jonathan. Now, every schoolmate of Jason is either a stepbrother of Edwin or a close friend of Jonathan, or both. In consequence, being a schoolmate of Jason is sufficient for not being an uncle of Arturo."
Is the argument, given the explicitly stated premises, deductively valid or invalid?
Options:
- valid 
- invalid

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Source and history

task_id
2f6c0d7e-bc22-5477-9c0f-103bf1058ab3
task_key
formal~5ffallacies--main--2f6c0d7e-bc22-5477-9c0f-103bf1058ab3
task_revision_id
1
config / split
formal_fallacies / main

Official source

initial import