User blog comment:Zathronas/Speculative Author - RWBY Relativity/@comment-25405817-20160225041708/@comment-24218038-20160225042334

Good one! I actually had the same problem when coming up with my theory.

Here's what I found: In an afterbuzz interview, Miles and Monty explained that you they activate dust while processing it so that machines could use it.

I had a hell of a time to find that quote lol. It was the only thing that made no sense.