Yet, memory is a necessary ingredient for this credibility. No, I didn't do that. It's not really there. Given memory loss as a presence, the voice of authority is unreliable. Maybe you didn't, maybe you did.
Uncertainty is the issue.
Credibility is at risk. It places it in jeopardy. Like we do with everything else, the best we can. The shape and texture of that response is illusive. Of course not.