definitions in the society of which the group is a part,” and that it is “discrete and [has] definable boundaries-it must not be amorphous, overbroad, diffuse, or subjective.” Id. at 214. Social distinction “exists where the relevant society perceives, considers, or recognizes the group as a distinct social group.” Id. at 217. “While the analysis of a particular social group claim is based on the evidence presented and is often a fact — specific inquiry, the ultimate determination whether a particular social group has been established is a question of law.” Id. at 209-10. Asylum seekers from Central and South American countries have long pressed for the recognition of particular social groups related to gangs and violence. . The agency has rejected these claims. See, e.g., id. at 221 (<HOLDING>); Matter of S-E-G-, 241. & N. Dec. 579, 586-88
holding that former gang members do not comprise a particular social group holding that young men who resist gang recruitment do not constitute a particular social group and refusal to join a gang does not amount to a political opinion holding that government informants are not members of a particular social group holding that government material witnesses do not constitute a particular social group holding that  former members of the mara 18 gang in el salvador who have renounced their gang membership does not constitute a particular social group because it lacks particularity because it is too diffuse as well as being too broad and subjective