Okay, continue on Williams. So when we search information, we are making a choice on what to read, what to accept, what considered as beliefs. So, we will decide which questions are worth investigating, because obtain knowledge itself as an activity will involve cost, strategy and involvement. So the activity of obtaining information or knowledge is an investigative investment. Optum knowledge itself has intrinsic values. For example, way optum knowledge may be is to fulfill our curiosity.