In the far future, a planet in the Milky Way that was colonised by humans 500,000 years before has developed nose-wrestling as a means of establishing dominance.
This is thought to have begun with a fabled inhabitant who, by chance, had an unusually large and strong nose and used to jut it in the direction of opponents. He would even walk up to them and physically press his nose against theirs, thus intimidating them. Over generations this became fashionable and eventually a sign of dominance. Although nose fights can last for a long time, they are very rarely fatal so this is an efficient way of resolving conflicts.
I want my humans to have developed a prehensile trunk with which they can wrestle. I am however concerned that there are evolutionary branches that may be dead ends. Is it too late for human noses to develop new sets of muscles and hence prehensility, or can evolution always find a way out of a dead end?
Note: If we are stuck in a blind alley with respect to prehensility, I wonder how noses could develop so as to best enable fighting.