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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: Being a cousin of Jana is necessary for being a workmate of Leonor. Every cousin of Jana is a daughter of Tracy or a sister of Sara. So, necessarily, every workmate of Leonor is a sister of Sara or a daughter of Tracy."
Is the argument, given the explicitly stated premises, deductively valid or invalid?
Options:
- valid 
- invalid

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Source and history

task_id
a83b36ef-90dd-5d4e-b8f8-cb6ea5f3d685
task_key
formal~5ffallacies--main--a83b36ef-90dd-5d4e-b8f8-cb6ea5f3d685
task_revision_id
1
config / split
formal_fallacies / main

Official source

initial import