- Why is the Arbiter the only Elite on Earth helping human forces? I know the Elites were glassing Delta Halo to keep the Flood from spreading and came to Earth because they were following the Flood-controlled ship, but they could've arrived earlier and delivered the beating to Truth's fleet that they later give at the Ark.
- Why was the UNSC in such a hurry to stop Truth? Don't they know that only a human can activate the rings?
- At the end of the mission "Floodgate", Cortana's message explicitly states that the Ark has a way to stop the Flood without firing the Halo Rings. They went through the Portal to find that solution and end the threat Truth posed once and for all. Their actions on the Ark were then about stopping Truth. They couldn't take the chance that he'd find a way to fire the rings without a human, or that he didn't have human prisoners he could use to do it.
- Why did Spark agree to activate the new Halo ring initially, but then disagree when Johnson was about to activate it? He stated that a premature firing would destroy the Ark, but, as seen in Halo Wars 2, the Ark is in perfectly fine shape, which makes his statement rather moot. Premature firing only destroyed the ring. Shouldn't he, as a Monitor, have already known that?
- Guilty Spark didn't freak out over the possibility of the Ark being destroyed, he freaked out over the fact that the replacement ring would be destroyed, which was destroyed. Having already lost Installation 04, and being quite mad at the time, the idea of losing another one of "his" rings was too much to bear.
- Although, according to the timeline, construction of a new ring only takes about three months. For someone who's been kicking around for around 100 millennia, waiting for a second replacement would be like waiting for a fast-food order to be fixed...
- Spark explicitly states that his knowledge of every other Forerunner installation is limited as a form of compartmentalization; and he admits that he wasn't certain that the Ark was building a new Installation 04, merely that "I had my hopes". As such, he may not have not known how long it would take to build a new ring. In any case, he was very clearly crazy, and simply unwilling to let another of "his" rings be destroyed.
- I might be missing something here, but one thing I still wonder about is why firing Installation 08 was meant to be the solution to defeating the Flood once and for all, when 1) not all of the Flood were on the ring; and 2) the big twist of Combat Evolved clearly establishes that firing a Halo ring won't eradicate the Flood directly - it kills everything else and only kills the Flood by depriving them of biomass to assimilate. With that in mind, what was the point of activating the ring, especially given the fact that, as Halo Wars 2 shows, destroying the ring didn't destroy the Ark as well?
- The Halo rings killing the Flood's food but not the Flood itself seems to have been ignored by everything since the first game. Or maybe it means that it destroys the dead bodies the parasite is in, in addition to any living thing the Flood could take over. With nothing alive or dead to take over, the Flood dies. All active Flood were in fact at the Ark, when they fired it. Cortana's plan was essentially to sucker the Gravemind into going to the Ark, so they could fire Installation 08 there. That way it would kill all the Flood, but not the galaxy. Any remaining Flood in the galaxy would presumably be in stasis chambers being studied, and thus no longer a threat.
- Exactly how did Sergeant Johnson get a Warthog out of the Forward Unto Dawn when the ship wasn't directly connected to a platform on Halo, and why didn't he just take a Pelican instead? It's clear that he knows how to pilot one, seeing as when the Gravemind turns on the heroes after killing the Prophet of Truth, Johnson's the one flying the Pelican to try to get himself, Master Chief, and the Arbiter out of there, so what's the explanation behind this? Out of game, I understand that the developers obviously wanted to end the game (and trilogy) the same way the original game ended, with an epic Warthog run, but in universe, it doesn't add up.
No Index for the Ark?
