whether I am an atheist or I am agnostic or I am Muslim does not matter. You accept it that this is something that everybody thinks is good. And now think about what is happening with Iranian currency. It has been significantly devalued because of all this embargo that we have created. So that is really a paper. And that paper has certain value because everybody in the world thinks a dollar is very valuable. It's a social fact and there is no way to justify whether this is true or not. It is true right now. I can use it anywhere I want, but I do not know what will happen to these really 10 years from now. So those are the distinctions we need to make and we will make those distinction when we're talking about scientific effect and social fact. In this particular case of your fire can be basically determined by scientific method. Because what can we do really even 5,000 years we didn't have to go that far? We can find out really that although oxygen is necessary it does not create fire everywhere. So that means something else has to happen. So that is a systematic way of doing experiments and then to find that out. But I have seen few places that where there is fire