Deletion of Categorical perception

Comment: I had originally closed this as a clear keep. However, after being requested to look into this by the nominator, I got curious and ran a check using Earwig's tool...and https://tools.wmflabs.org/copyvios/?lang=en&project=wikipedia&title=Categorical_perception&oldid=&use_engine=0&use_links=0&turnitin=0&action=compare&url=https%3A%2F%2Feprints.soton.ac.uk%2F257719%2F1%2Fcatperc.html given the results I'm struggling to come up with a good reason not to speedy delete, or at least blank, this as , and have accordingly relisted it in case somebody can supply a good reason why it isn't
Stance: comment
Cited policy: Wikipedia:Copyright violations (WP:COPYVIO)