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BIG-Bench Hard / Here comes a perfectly valid argument: First, every close friend of Krista is…

Problem

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input

"Here comes a perfectly valid argument: First, every close friend of Krista is not a niece of Gwendolyn or not an ancestor of Terrie. Second, everyone who is a cousin of Laurie is a close friend of Krista, too. We may conclude that no cousin of Laurie is both an ancestor of Terrie and a niece of Gwendolyn."
Is the argument, given the explicitly stated premises, deductively valid or invalid?
Options:
- valid 
- invalid

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Source and history

task_id
dce9f24b-e61e-5e9f-9827-94f4cbe268ac
task_key
formal~5ffallacies--main--dce9f24b-e61e-5e9f-9827-94f4cbe268ac
task_revision_id
1
config / split
formal_fallacies / main

Official source

initial import