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BIG-Bench Hard / Here comes a perfectly valid argument: First premise: Everybody who is neither…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

input

"Here comes a perfectly valid argument: First premise: Everybody who is neither an ancestor of Andy nor a nephew of Donald is however a cousin of Ralph. Second premise: Dale is neither a nephew of Donald nor an ancestor of Andy. We may conclude: Dale is a cousin of Ralph."
Is the argument, given the explicitly stated premises, deductively valid or invalid?
Options:
- valid 
- invalid

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Source and history

task_id
adfc1d00-444d-5a4b-9af6-9d19d186ea92
task_key
formal~5ffallacies--main--adfc1d00-444d-5a4b-9af6-9d19d186ea92
task_revision_id
1
config / split
formal_fallacies / main

Official source

initial import