I didn't make [i]any[/i] assumptions, I would ask you to read the Vex Fragments before making false accusations. They don't directly say "Humans created the Vex." It was a conversation between a group of 100+ Scientists talking and joking about what their killcounts would be. They then went into a machine and that's where the grimoire card ends. The Vex weren't CREATED by humans, they more USED to be humans rather. Just read the grimoire and you'll understand what I mean.