"Of ways to carry out his creators' ultimate agenda, 'impersonate Miles' is but one, and it wouldn't necessarily be the most effective one even if telling them apart were much more difficult than it is. What worries me is not so much the prospect of a substitute Miles as the prospect of someone with Miles's potential and Miles's drive and a relationship to Barrayar with the same depth and complexity as Miles's, but considerably less positive and devoid of loyalty."