(This will be long) My question is how does the ghost know they shouldn't exist "yet"? That's implying that the ghost knows the parts will exist later on, but how could he know that? If the parts don't exist during the time you find them then he would say they don't exist. But it's almost like he knows the stranger... For example, when he was getting a signal on the moon that was from the "speaker" but was actually from the stranger, wouldn't he be able to tell the difference between a signal coming from Venus and earth? My theory is he is attempting to hide the fact he knows her. Anyway, this theory about parts not existing yet could tie into the theory that the vex and traveler are the same thing. For those of you who don't know the theory goes that the traveler uses the vex to create universes, and then the traveler goes to that new universe and causes "collapses" and then helps the humans so they think it's their savior. But really the traveler is sucking the power from the guardians worshipping it and becomes more powerful. Once there is no more power, it creates a new universe with the vex and destroys the old one. My theory is the ghost is from the traveler so it has seen that the strangers rifle will eventually exist, thus him saying the parts shouldn't exist [b][i]yet[/i][/b]. But i don't know. Maybe I'm wrong. It's a pretty crazy theory but it would make sense about the ghost saying yet like he knows it will exist eventually. Tell me what you think

I think there are many possible and reasonable explanations for how someone could know something is made from parts that shouldn't exist yet. If I saw someone shooting a gun that fired balls of glowing energy or riding a board that actually hovered off the ground I might assume it's from the future and uses technology we "shouldn't" have yet. Of course, in that situation it's more likely that it was developed in secret and I just didn't know about it but a Ghost that is given access to as much information as possible and has been searching the Earth for you for centuries probably has a very very good idea of what technology is available to humanity and what isn't. To be honest our Ghost is a lot smarter than us and I think it's reasonable that it would be able to understand a strange gun well enough to conclude that it was created with technology not available at this point in history, but possibly (in fact probably) in the future. And since its analysis of the gun comes after our many encounters with the Vex our Ghost suspects like we do that there exist entities that can step across time opening up this possibility even more. That doesn't mean you're wrong. I had never given thought to the fact that the Ghost wasn't able to determine who the caller was when the Stranger contacted us on the Moon or that it guessed when first contacted that it might be the Speaker. It's possible our Ghost was acting like it didn't know the Stranger for some reason although I think it's more likely it wasn't. It's also very possible the Vex are directly connected to the Traveler and/or that the Stranger is as well. I don't know who the Stranger is, what the Traveler is, or where the Vex came from. So I don't mean to discourage your theories, they are certainly possible. I just wanted to share my thoughts too.

Also to add on to my theory, the ghost later says that the stranger contacted you from Venus. If it was that easy to tell where it was from, then why would he say it's from the speaker of its clearly coming from Venus?