bobmac
Major Champion
The rule of thumb rulefan mentioned is "could it be anywhere else?" By looking "anywhere else" you confirm that you are not certain it is in the water. Thus, no VC.
If I cannot use the English Oxford Dictionary then maybe you can help me with this
''In the majority of cases, in order for it to be reasonably concluded that the ball does not lie anywhere outside the water hazard, it is necessary to go forward to assess the physical conditions around the hazard.''