Yeah... they had a partial defense there - the simple functions like add and subtract called existing functions with some wrappers for overflow issues, which th

Yeah... they had a partial defense there - the simple functions like add and subtract called existing functions with some wrappers for overflow issues, which they claim is standard practice for Ether (I wouldn't know). But the defense of exponentiation was just "there isn't a good one yet, so we built our own, and according to some tests we didn't show anyone it looks fine".