All of science is based on it…But I don't really know why it works

If I were to flip a coin a million times I’d be damn sure I wasn’t going to get all heads. I’m not a betting man but I’d be so sure that I’d bet my life or my soul. I’d even go the whole way and bet a year’s salary. I’m absolutely certain the laws of large numbers—probability theory—will work and protect me. All of science is based on it. But, I can’t prove it and I don’t really know why it works. That may be the reason why Einstein said, ‘God doesn’t play dice.’ It probably is.
— Physicist Leonard Susskind, Stanford University, in his 2005 essay for the collection “What do you believe is true even though you cannot prove it?”