Suppose Sir Elton Hercules John CH CBE (born Reginald Kenneth Dwight, 25 March 1947) is an English singer, songwriter, pianist, and composer. He has worked with lyricist Bernie Taupin as his songwriting partner since 1967; they have collaborated on more than 30 albums to date.
Can we infer that "Bernie Taupin is a musician who has never worked with Elton John."? Yes, no, or maybe?