When you throw a ball in the air, you know it is going to come down. Because that is how gravity works.

You can test it and observe it. There is absolute proof that when I do this that will happen.

On the other hand, smoking has never been proven to actually cause cancer. We don’t actually know the total extent of the human contribution of climate change.

I think we spend too much time (and put far too much stock) into proving such things.

Absolute proof, while important, is not always necessary in these situations. Because proof isn’t what changes people’s minds. Speaking to the heart and to our guts has far greater impact.

Humans are emotional creatures.

Sometimes, 99% is good enough.

Sometimes, we feel enough to believe enough.