Whether you believe my explanations are "cogent" or not is only your interpretation and opinion. Frankly, neither are of any interest to me what-so-ever. Let's let others decide. No answer required. You're dismissed.
(~Shrug~)
Mr Pointing's coherent-or-incoherent hypothesis: "Perhaps Jenner suspected RP in some way"
Question!How could a test on 2 curtain rods for Mr Oswald's fingerprints possibly be reflective of Mr Jenner's alleged suspicion of Ms Paine?
Same question, put differently!
How exactly would a positive result for Mr Oswald's prints on either or both of the rods be a problem for Ms Paine?