If you reverse compile the software and can single step through it, you have explained the software. It doesn't matter if you have identified Alexander Graham Bell as the inventor of the first telephone 120 years earlier, you have a real and useful chunk of information.
I disagree with both of these points. - you can absolutely explain evolution without explaining origin - you can hypothesize about origins without needing to know if it happened once or a thousand times But, yes, Dawkins is boring.
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