  De Rijk suggested the name Richard Fishacre, disagreeing with the suggestion of Richard Fitz-Ralph offered by Macray on the basis that the dating of the text within the second quarter of the thirteenth century is more consistent with Fishacre's   chronology.[8]  Jan Pinborg suggested the name Richard Rufus also on grounds that the dating of the Abstractiones is consistent with Rufus' being at   Oxford.[9]  It is generally assumed that the author is English. Pinborg offered one further bit of evidence for the name Richard Rufus in that there is some reason to think that certain doctrines of Richard Rufus, as criticised by Roger Bacon, are in the Abstractiones. The primary doctrine in question attributed to Richard Rufus and criticised by Roger Bacon is, in general terms, that the signification of a name can remain in the absence of any actual thing signified by that name, although, as Bacon suggests, the proponents of this view must supply some kind of “habitual being” for the lost actual significate of such names. It is this doctrine of the “esse habituale” that Bacon finds objectionable. That Richard Rufus does seem to have such a doctrine appears clear in his discussion of the question “Whether Christ while three days in the tomb was a man” (“Utrum Christus in triduo mortis fuerit homo”) in distinction 22, book III of his Sentences  Commentary.[10] 