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BIG-Bench Hard / Here comes a perfectly valid argument: To start with, Justin is not an uncle of…

Problem

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input

"Here comes a perfectly valid argument: To start with, Justin is not an uncle of Roberto or not a workmate of Glenn. Now, every great-grandfather of Reyes is an uncle of Roberto and a workmate of Glenn. We may conclude: It is not the case that Justin is a great-grandfather of Reyes."
Is the argument, given the explicitly stated premises, deductively valid or invalid?
Options:
- valid 
- invalid

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Source and history

task_id
e1c4bf8d-358e-58d4-abdf-6d5d7a84de6b
task_key
formal~5ffallacies--main--e1c4bf8d-358e-58d4-abdf-6d5d7a84de6b
task_revision_id
1
config / split
formal_fallacies / main

Official source

initial import