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: Isaac Ambrose was an English Puritan divine. He graduated with a BA. from Brasenose College, Oxford, on 1624. He obtained the cure of St Edmund’s Church, Castleton, Derbyshire in 1627. He was one of king's four preachers in Lancashire in 1631.