You can't prove any hypothesis, you can only improve or disprove it.

Of course, ... this is a hypothesis that we have no way to scientifically prove or disprove. However, we believe it's currently the best explanation.

Sexual harassment is as difficult to prove as it is to disprove.

It just doesn't add up. To me, it's a convenient story. I can't prove it or disprove it, but I have my doubts.

I am convinced that policies meant to reduce alleged carbon dioxide-induced global warming will be destructive.

The House Democrats don't want Gore humiliated, so they slammed the door of the Capitol in my face. They are cowards.