Why does “The Amazing Race” keep winning Emmys? Because it dares contestants to use their brains (and, you know, makes what is reality TV’s most enormous logistical nightmare look like a cakewalk each week). But sometimes, the show offers up a problem so muddled and confusing, we have to wonder if anyone’s brain understands what Phil is talking about. Case in point: the first challenge in Sunday’s premiere, which involves a pretty complex brain teaser. Let’s just say that after watching it back a few times, we’re still not entirely sure what the teams are supposed to be doing here. Take a look below. “The Amazing Race” Season 19 premieres Sunday, Sept. 25 at 8/7c on CBS.