1. We don't have to understand how it works to make something that works as well. It can always be found by trial and error. 2. That's indeed not an argument.

1. We don't have to understand how it works to make something that works as well. It can always be found by trial and error. 2. That's indeed not an argument. 3. Whatever the human body does, it does not require any of its parts to be smaller than an atom. Transistors are already much smaller than a neuron. When Moore's law ends, companies will focus on making them more efficient so they can use more of them in the same time.