 Litland claims that  (5)  is plausible, or at least as plausible as  (1)  and  (2).  And, provided that any collection of facts that is a full ground is such that any fact among that collection is a partial ground,  (3)  follows from  (5).  (See Raven 2015 for a similar treatment of this case; see also Rodriguez-Pereyra 2015 and Tahko 2013 for potential counterexamples to transitivity involving truth.)