without understanding anything else. So I basically went and started painting everything red. Because it's not in it, and it stopped cholera. So if I do this, arsenic will be stopped. Yes, it will be. The only difficulty there is that this is rural Bangladesh, number one. I have over 10 million wealth right now and not one. So as a result, really, my theory doesn't go with actually what is happening on the ground. So we got into serious mess and that took another 20 years to unfold. So what would happen really in a principle of pragmatic approach really you want to do really you want to find out a problem different question. So the question was that really okay so I have infant mortality problem in Bangladesh. So to solve that infant mortality problem I found out the quickest solution. What was the quickest solution? They dig some shallow wells. It's cheaper, it's quicker, fine. And we've done that. And that is perfectly fine. What was missing there is that they did not monitor really the progression of this. They just assumed that it's a simple solution it will stay forever. If they have monitored this, they would have found out long ago. That's where basically this problem-driven question with hypothesis consistent with observed signals. I need to keep observing the system as it evolves. If I can do this, then I have an approach that is more or less functional. So to summarize, then basically what we need to do really