Penny: So, what's new in the world of physics?
Leonard: Nothing.
Penny: Really? Nothing?
Leonard: Well, with the exception of string theory not much has happened since the 1930s – and you can't prove string theory. At best you can say, '“Hey, look! My idea has an internal logical consistency'.
Leonard: Nothing.
Penny: Really? Nothing?
Leonard: Well, with the exception of string theory not much has happened since the 1930s – and you can't prove string theory. At best you can say, '“Hey, look! My idea has an internal logical consistency'.
