Linux is not in the public domain. Linux is a cancer that attaches itself in an intellectual property sense to everything it touches. That's the way that the license works.
Bio: Muriel Lester was born in Leytonstone and grew up at Loughton, where she was a member of the Union Church. She was a social reformer, pacifist and nonconformist. As a Baptist, she was baptized in 1898, at 15.