how could I get water in my second floor bathroom? I get it because the water is pressurized. So I can create conditions that really the things can also violate the physical laws. Now when those physical laws are violated by human intentions, then you have a problem. Like for example, Ganges was flowing fine. India decided to build a barrage. Barrage was not there. Now they can control it. So that's a physical control of water really which is violating the physical principles. And that's when now your natural systems and human systems are coupled and then it becomes a complex problem. Is the making sense? Yes, sir. All right. So here I think I'll give you a quiz and then we'll continue. So how many colors do you see here? What are diplomacy, a principal, pragmatic approach to govern, manage, complex societal problems? How many colors? Three. Three, good. So remember three, three is important here. Then I'll tell you something else. So, so what are diplomacy, a principle, pragmatic, govern, complex problems? So put all kinds of words and I'm sure you have heard many of these words many, many times in this class. So how many colors are here? Seven. Seven. So you have three and then you have seven. So I'll just give you one basically clue and then we'll discuss this at the end of the class. So if you really want to be very scientific about this, there are only three colors, RBG, red, blue and green. Then everywhere you go really