User blog comment:Fijibuffman1925/Lucy's Betrayal/@comment-27202257-20140701183306/@comment-13471981-20140701221257

Almost; the group discover Lucy's betrayal through Desmond who learnt of said betrayal by being shown Clay's memories in the split second before he got deleted (during the hug probably). Desmond didn't really "relive" Clay's memories, he probably got a kind of summary of them. I think :s