Miles can't get a read on Sayid's body

At the temple, Hurley leans over Sayid's body to tell him that if he ever wants to talk, he's around. Miles, who is sitting on the other side of Sayid's body, looks puzzled. Clearly, he can't get a read on Sayid's body like he normally can with others. This is the point it became clear that Sayid is not dead.