evidence: … if you have an apple and I have an apple, and we swap apples — we each end up with only one apple. But if you and I have an idea and we swap ideas — we each end up with two ideas. [...] "If I have a dollar and you have a dollar and we exchange we will be even, but if I have an idea and you have an idea and we exchange you will have two ideas and I will have two ideas" –F. J. Smolka [...] Was it not George Bernard Shaw who once said, in words I perhaps paraphrase: "If two men each give one another an apple they still each have only one apple. But if each of them gives the other an idea, they each have two ideas."