 This “shift the burden” strategy is a consequence of the fact that Heytesbury, even more than Bradwardine and Swyneshed, views the question of insolubles in the context of obligationes, a highly formalized medieval disputation context that is a subject of much recent  discussion.[28]  But Heytesbury shares one claim at least with Bradwardine: that no proposition, in a suitable scenario, can signify only and precisely that it itself is false. It must signify something more than just this. See Heytesbury [H-OI] §50 and Bradwardine [B-I] § A4.3.