Deletion of Skill set

Comment: The nominator says that they are on the fence so I'm not seeing a case to answer.  The topic is analysed in detail in sources such as https://books.google.co.uk/books?id=3cZO0cTOOTMC&pg=PA40 this and so it passes .  The matter is then one of ordinary editing not deletion and |AFD is not cleanup
Stance: keep
Cited policy: Wikipedia:Notability (WP:SIGCOV||WP:NOTCLEANUP)