No one gets through life without making countless assumptions about things we cannot properly know. In routine cases, this is usually harmless. That does not remove our obligation to give someone a fair hearing if they initiate dialogue asking about our reasons for feeling committed to the assumption. Except in immediate emergencies, we should always be open to such questions, and on our own initiative we should raise such questions to ourselves in ambiguous situations. This means we also need to learn to be good at recognizing ambiguous situations, which involves lifelong care and active practice at doing it. (See also Epistemic Conscientiousness.)