NT-GOSPEL.filter - rwp absolved:

rwp@Mark:11:33 @{We know not} (\ouk oidamen\). It was for the purpose of getting out of the trap into which they had fallen by challenging the authority of Jesus. Their self-imposed ignorance, refusal to take a stand about the Baptist who was the Forerunner of Christ, absolved Jesus from a categorical reply. But he has no notion of letting them off at this point.