The Board of Immigration Appeals has rejected the concept of perceived membership as a particular social group, finding that there were be no circumstances in which the perceived members of a group would be socially distinct from the actual members of the group. “[P]erceived membership in a group cannot itself be a cognizable particular social group. Rather, the underlying group is the true particular social group, and where that underlying group as defined is not cognizable, the perceived group is also not cognizable.”
The full text of Matter of L-A-L-T- can be found here: