 The hypothesis is what you believe that is true, and to test if that is that that your hypothesis is right, you need to do essays, those where we call experiments. And a hypothesis combined of results coming from those different experiments, you, combining with the data generating for those disasters and these experimentations, can tell you if your hypothesis is true or if it's false. If it's true, you can move forward and go for the next question you have and create new hypothesis. If it's not, you need to do some extra essays to try to understand where your hypothesis was wrong, and you can reformulate that to really achieve the main goal of understanding and establish the new knowledge.