You must come out of your hole and start a new hole somewhere else.
The treasure may be just below the surface.
Leaving an established theory and trying again is lateral thinking
Example
What happens from the previous example, if the solution is not below ghe
hole. It maybe very nerar the solution, but in a different place.
In this case, one must get out the established hole and dig a new hole in a
different place. Again this describes "Lateral Thinking".