And yet he seemed completely unperturbed by any moral doubt.

Uruguayans will engage in no moral doubt: the right team won.

People who live by religious certainties don't have to waste time with recalcitrant facts or moral doubts.

I had thought him too self-centered to entertain moral doubts.

The friendship between them was too deep to be touched by moral doubt.

Of that he had no moral doubt.

His moral doubts about this are apparent in his description of himself as a 'voyeur'.

The physicists believe they are in a race with Hitler's scientists, and they do not have time for moral doubts.

The character's honest doubts, both moral and political, tend to be resolved, or pushed aside, by practical considerations.

Was his withdrawal at this point a matter of scientific defeat or of moral doubt?