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BIG-Bench Hard / Here comes a perfectly valid argument: First, being an ancestor of Jonathan is…

Problem

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input

"Here comes a perfectly valid argument: First, being an ancestor of Jonathan is sufficient for not being a grandson of Carmelo. Second, whoever is an ancestor of Jonathan is not a schoolmate of Reyes. Third, every grandson of Carmelo who is a schoolmate of Reyes is also a close friend of Clifford. We may conclude: Being an ancestor of Jonathan is sufficient for being a close friend of Clifford."
Is the argument, given the explicitly stated premises, deductively valid or invalid?
Options:
- valid 
- invalid

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Source and history

task_id
2646dfa6-9674-5a85-89d3-7aa44a52f410
task_key
formal~5ffallacies--main--2646dfa6-9674-5a85-89d3-7aa44a52f410
task_revision_id
1
config / split
formal_fallacies / main

Official source

initial import