Comment by nerdponx
3 years ago
At that point, you give up on the search for understanding and must evaluate the fence given the information that you do have and can make sense of.
It's really not any different from any other decision making process. The principle exists to encourage critical thinking, not to obstruct progress.
I actually like the principle as a tool for critical thinking, but like the precautionary principle which can also be a tool for critical thinking it has a tendency in practice to be converted into a thought-stopping and action-stopping cliche.