The Law of Observation is a Waterbien law of physics discovered by Ardex Viridus that states that anything that exists within the Universe is only observed that way because if it was not that way, the exact circunstances leading up to it's observation would be different so it would not be observed in the same way. This gained much support among the Waterbe, as the Waterbe-centric viewpoint of the law matches well with Waterbe law and ethics