Does he mean instances like when Job's friend did not speak what was "right" about God? As in:
Job 42:7 After the LORD had said these things to Job, he said to Eliphaz the Temanite, "I am angry with you and your two friends, because you have not spoken of me what is right, as my servant Job has.
Or like when Peter may or may not have necessarily lied when he said, "I don't know the man!" as in Mt 26:74. He may have had doubts at that moment as to whether he had really ever 'known' him [as he thought]; because they didn't understand what Jesus meant when he said he had "...to be betrayed into the hands of men. They will kill him, and after three days he will rise." [Mk9:31] For it is written:
But they did not understand what he meant and were afraid to ask him about it. -Mk 9:32