Davros and The Doctor in “The Witch's Familiar”

Did I do right, Doctor? Tell me… was I right? I need to know, before the end. Am I a good man?

You really are dying, aren't you?

Look at me. Did you doubt it?

Yes.

Then we have established one thing only.

What?

You are not… a good doctor. [After a moment, the Doctor laughs, and Davros laughs with him.]