I read an answer here that said a description says HOW something is while an explanation entails WHY it is that way. If so then how do we determine when something has been explained (if it can be)? For example, I understand that when it rains the ground becomes wet. Why? I don't know the chemistry behind it but water is wet and covers the ground. But some could ask WHY is it wet and not something else to which many would respond "It just is". Is "It just is" the real explanation? Is the real explanation to everything "It is what it is", even though we may not know what IT is?