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BIG-Bench Hard / Is Fred a cousin of Robert? Is Joe related to Bob? In large families, it is…

Problem

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input

"Is Fred a cousin of Robert? Is Joe related to Bob? In large families, it is sometimes difficult to keep track of all one's relatives. The following argument seeks to clarify some such relations: First, Cecil is a schoolmate of Tyler. Second, nobody is neither a schoolmate of Tyler nor a nephew of Owen. So, necessarily, Cecil is not a nephew of Owen."
Is the argument, given the explicitly stated premises, deductively valid or invalid?
Options:
- valid 
- invalid

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Source and history

task_id
e2c1c62a-017c-5a08-b6b5-f030e8bd8940
task_key
formal~5ffallacies--main--e2c1c62a-017c-5a08-b6b5-f030e8bd8940
task_revision_id
1
config / split
formal_fallacies / main

Official source

initial import