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BIG-Bench Hard / It is not always easy to grasp who is consuming which products. The following…

Problem

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input

"It is not always easy to grasp who is consuming which products. The following argument pertains to this question: First of all, every regular consumer of Bumble and bumble shampoo is a rare consumer of Vaseline soap. Next, whoever is not an occasional purchaser of Organic Fiji soap is a regular consumer of Bumble and bumble shampoo. From this follows: Being a rare consumer of Vaseline soap is necessary for not being an occasional purchaser of Organic Fiji soap."
Is the argument, given the explicitly stated premises, deductively valid or invalid?
Options:
- valid 
- invalid

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Source and history

task_id
ad330d0d-a67d-5134-b37b-ffd0c8388e73
task_key
formal~5ffallacies--main--ad330d0d-a67d-5134-b37b-ffd0c8388e73
task_revision_id
1
config / split
formal_fallacies / main

Official source

initial import