Complex sentence: As the interview proceeds, the director is able to catch his subject in a direct contradiction, though Rumsfeld is not disconcerted, unable to engage in self-reflection, let alone self-criticism.
Split into simpler sentences: As the interview proceeds, the director is able to catch his subject in a direct contradiction, though Rumsfeld is not disconcerted. Morris finds him unable to engage in self-reflection, let alone self-criticism.