"Oh..." Elizabeth doesn't seem surprised by this, only troubled. She can understand, honestly, why Ivan could be hesitant to tell Alys everything that's happened to him.

"He might be trying to preserve any semblance of a timeline for his own safety." Perhaps-- maybe Miles walked him through it, or Gregor. At least, Elizabeth knows she tries to avoid talk of quantum physics with Ivan when she can. "Things become unraveled quickly, even when your intentions are good."