 Curiously, while Ockham can be credited with having been the first to use the terms ‘formal consequence’ and ‘material consequence’ systematically, the content of his distinction did not pass on to later authors. This is arguably because Ockham’s distinction is cast in terms of intrinsic and extrinsic middles, peculiar concepts belonging to the Boethian framework which was already losing its influence by Ockham’s time (Green-Pedersen 1984). Indeed, one seldom encounters the concept of ‘middles’ in writings of the post-Ockham period, except for texts under his direct influence.