#promise!!

He rejects the idea that "Future" Aventurine is actually himself at all, and asserts that this "Future" figure is a "newborn of the Harmony's power." He even has a throwaway line asking if he's about to become an Emanator of the Harmony himself. (And the Ena-Gaiathra fans rejoiced.)

Normally I would say that's all there is to this, Aventurine just not wanting to accept this ghostly version of himself and the harsh truths it keeps bringing to light.

But, throughout the entire lead up to the end of 2.1, we get weird moments where the "Future" Aventurine asks for information it should already have. A lot of these are passed off as "Well, I just want to hear you say it yourself!" but... if it's truly Aventurine himself and knows all there is to know about him, why does it need to hear the info from the real Aventurine?

Why do we continually get exchanges that strongly call into question what the "Future" Aventurine even knows?

And:

Later:

(Shouldn't it have already known?)

Repeatedly, the "Future" Aventurine says things that imply it is still learning about the real Aventurine:

Even up their very last scene together, the "Future" Aventurine was constantly pressing the real Aventurine to reveal every detail of his plan:

"Future" Aventurine goes through the cornerstone shuffle, guesses at Ratio's involvement, pushes Aventurine to reveal the broken Aventurine cornerstone, asks what tactics Aventurine intends to use to win his gamble, how the IPC fits into all of this, and finally comes to the realization that Aventurine plans to use Acheron to create "death."

We could go very deep with this and suggest all these weird "Did you or did you not know this information? Are you really me or not?" exchanges are just meant to show Aventurine's doubting nature, that his mind is a mess and that he doesn't, even at his deepest, understand himself, but I don't think the devs did this accidentally. We're being given plausible deniability on purpose.

At the very least, we players are supposed to ask ourselves: Could it be that this really is the Harmony and not Aventurine himself?

Until the very last scene, when "Future" Aventurine completely changes his tune to gentle empathy, real Aventurine is definitely convinced that he's still talking to a manifestation of Sunday's power.

Right after the line about Ratio's betrayal supposedly being real or not, Aventurine is still saying:

Or, an even clearer indicator that real Aventurine was convinced he was talking to Sunday's manipulations: The "Future" Aventurine is listed as ??? in the dialogue option all the way to the very end, when Aventurine at last accepts that he may be speaking to himself, and the name card finally changes to "Aventurine."

So, what to make of this line then:

Personally, I think there's enough dubiousness to the whole situation to suggest that we can't really take this line at face value.

Is Aventurine genuinely doubting Ratio here... or, convinced that he's still talking to the Harmony, is Aventurine scrambling to try to keep the last details of their plan out of Sunday's reach?

If after this line he's still telling "Future" Aventurine to stop stealing information from his mind, can we really expect him to be speaking truth here?

Throughout all of these scenes with "Future" Aventurine, real Aventurine continually refuses to reveal new details about his plot, forcing "Future" Aventurine to fill in the gaps. It's clear from other lines throughout the theme park scenes that Aventurine is intentionally avoiding giving away any specifics that the "Future" doesn't already know:

So to me, even though I agree that Aventurine has been made into a distrustful person by his traumatic experiences and I think he does doubt the sincerity of everyone around him...

I don't necessarily think this one line about Ratio should be held up as an example of that deep doubt.

I think there's enough suspicion cast on the "Future" Aventurine and its possible connections to the power of the Harmony that many of the things Aventurine says to it might actually be attempts to mislead and distract, so that he can carry his final gamble through without Family intervention.

And I think looking at this line about Ratio from that mindset also introduces an entirely different possibility many people seem to overlook:

Is it out of character for Aventurine to make sure the only person sacrificed in his gambles is himself?

If Aventurine really thought he was talking to a manifestation of Sunday's power, could it be that saying "Maybe Ratio wasn't acting! Maybe he really did betray me!"... wasn't doubt, but an attempt to protect his co-conspirator? To shift the blame away from Ratio and spare him from the fallout if their plan ultimately went awry? To make himself the Family's only target?

I'M JUST SAYIN'!!