I don't think you actually have to even roll... as a Navigator "can spend a fate point to automatically succeed on a Navigator power"... unless the "evilness" scan isn't a Navigator power?  I'm not fully up on the Navigator stuff.  (although it surely seems nice to have one with us!  Those scans of Delila's have been VERY useful so far...)<br/><br/>As Sun-Su said, to know ones enemy and to know one's self is to ensure victory!  And so far, that's been proven very true.