Simply saying out loud that you do not have all of the information will directly affect how you carry yourself when you approach a challenging conversation. If you think you have it all figured out, that you possess all knowledge, facts, and insight about this situation, what will your posture likely be? My guess is that it will look like this: arrogant, closed, and judgmental. There is no way to engage in a healthy, fruitful conversation if that is your posture.