...Seeing as there is precious little doubt that Obama Sr was the father of Mark Ndesanjo, that would make it long odds-on favourite
...that Mark is the son of his parents
You appear to have deliberately missed out the following conditional..... “so if someone is going to insist on going down that route”....in order to create a strawman to destroy.
If my position was not clear, let me articulate it again......I don’t hold with this entire “resemblance” gig at all because there are far better ways to rationally approach the question of who anyone’s parents are most likely to be.......but that those who do hold with the resemblance gig in this thread appear to have, so far, ignored the half brother resemblance.