Shame on you Ali Nakhjavani. You were a member of UHJ for so many years - Baha'is call you a Scholar and you fool them !
Aghsan
 is the broken plural form (Jam-i-taksir/mukassar) of Ghusn. In Arabic 
it refers to 3 and more branches not 2 as Nakhjavani claims in this video. If 
Baha'u'llah had intended 2 branches he would have stated "Ghusnaan" or
 "Ghusnayn". Furthermore, Baha'u'llah had more than two male descendants
 (e.g. Muhammad Ali) and Nakhjavani is acting as if these people didn't 
existed - in a failed attempt to justify his false claims about "Aghsan" 
meaning two.