 A verbal obligation is created by question and answer in such form as: “Do you solemnly promise conveyance? I solemnly promise conveyance”; “Will you convey? I will convey”; “Do you promise? I promise”; “Do you promise on your honour? I promise on my honour”; “Do you guarantee on your honour? I guarantee on my honour”; “Will you do? I will do” (Gaius, Inst. 3.92, cited in Swain 2013)