[quote=@Yatagarasu]
<Snipped quote by Dynamics>

They don't have to. Their powers run off of what's called the "Not a Number Sector", or the NNS for short. If you think of Existence like... Like a book. If you think of it like a book, that's being written constantly, the Not a Number Sector is like the dictionary. There's the physical book and the words written on it are physical, but they only have meaning because of the NNS. It's why I died in the first place; the original Generate-class needs to be able to delete stuff to run the NNS correctly. So things were pushed in a direction by a certain few Codex to make one of the Triggers "become complete." That happened to end up being me, so I had to go in order to have the "compete" Trigger reinstated in the original Generate. That made it so the NNS wouldn't overload, and made it temporarily possible to go up to the next Scale. 
At least that's where they should have went. Apparently it wasn't that simple, but that's unrelated.  
[/quote]

Okay, so how does whatever-you-call-it know the difference between something coming in, talking to you, and going out vs. you sending something out?