Miller tried to sidestep this obvious point in his expert testimony at the Dover trial by conceding that Behe's argument was testable but insisting that it was a purely negative argument against Neo-Darwinism, not a positive case for intelligent design. This is mere wishful thinking on Miller's part. Behe's argument is also based on positive evidence for design. Behe points to strongly positive grounds for inferring design from the presence of irreducibly complex machines and circuits. This testable evidence is so powerful, so nearly ubiquitous, that it is often overlooked. Go out and find irreducibly complex machines, then find out, where possible, their causal history. Again and again one will find that the irreducibly complex machines (mousetraps, motors, etc.) were designed by intelligent agents. Indeed, every time we know the causal history of an irreducibly complex system, it always turns out to have been the product of an intelligent cause.