But you can never really know if A causes B or not. You can only create models, some that have A causing B and others than only have them correlated, and get r

But you can never really know if A causes B or not. You can only create models, some that have A causing B and others than only have them correlated, and get rid of models as you find contradicting data. What actually causes a ball to drop to the ground when I release it? We don't know. The best model (that I know of) is the bending of space time, but that isn't the real answer and may one day be overturned just as the older idea of mass attracts mass. I guess the question is, are we sure enough of our model to be able to trust the airplane isn't going to drop to the ground like the ball does, and how do we achieve equivalent certainty in the biological sciences.