Out of the billions of neurons in the human brain alone, every single neuron has a function, Drew. Every single organ has a function and every single cell has a function. And if any one of those does not work the way in which it was designed, then it can cause malfunction & disease. And this is in the human body alone! To say there is no design, is such an ignorant statement, that it's a waste of time even having disussing this issue with you. It's like arguing with someone who still thinks the world is flat.