If you read the vex Grimoires it has a strong amount of support. Long story short a single vex has the ability to process entire universes and play out what can/may happen as a means to infer their best reaction in the real world.
Definitely a good read if you haven't checked them out yet.
English
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Also while on Venus your ghost is talking about the gatekeepers and saying something about they guard time or something.
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Okay you just make it sound like the vex are related to the warminds. And the term warmind came from Halo btw.