Wait a minute... if he can't tell us that, then that means... there might be a third-party? In fact, I don't think we've considered the possibility all game. That means we're going to have to make a decision, aren't we?
From my previous reads, I still suspect Dormio the most. But I'm going to wait a moment, because I think we as a group should decide whether in light of Zakeri's refusal to tell us if we should still no-lynch.