(As proposed by dr saunders in https://tickets.metabrainz.org/browse/AREQ-1258.)

 

Regarding SPA for [anonymous], there is no way of knowing that “The track artist is [both unknown and] unknowable.” What is probably meant is “[unknown by] published research and/or scholarly consensus” but with such wording comes heightened threshold of definement and update, which editors cannot be expected to meet, lest they have part in both terms – which would be absurd for MusicBrainz; so meaning in effect can only be “[unknown] (but potentially discoverable with further research [by editor and/or scolar])” – which is already covered by [unknown]. 

 

For comparison, an artist long “known”, who recently – by published research and scholarly consensus – has had to be split in senior/junior: William Cornysh.