Wow, you've been working on that for awhile...
Yup.
--
"Okay, say that I do believe you," Alphonse crossed his arms. "How the hell does all of this... work?"
"It's quite awfully complicated," the Other Alphonse said, mimicking Alphonse's action. "I can explain it, but I suppose that for a broad overview, you don't need to know about the metaphysics of all of... this." He pulled out a piece of chalk, and materialized a chalkboard out of the ethereal threads that haunted this realm. "As you can already tell, your universe is only one of many countless universes, all inhabiting a plane called the Aether. This Aether supports the universes, and is the 'quantum foam' that new universes are born from, and old universes dissolve into. Your universe, D604, is part of the Delta worldline complex."
"Delta worldine..." Alphonse raised an eyebrow. "So there are other worldline complexes out there?"
"Correct," the Other smiled. "One of four known to us. I belong to the Alpha worldline complex -- I'm actually the Prime Alpha Alphonse," he sheepishly said.
"Prime Alpha Alphonse?"
"Yeah, I belong to universe A0." the Other began drawing a straight line on the chalkboard. "Say that you make a decision about what you want to wear today. In one possible worldline, you decide to wear your dress uniform. In another worldline, you decide to go stark naked. Now, obviously, since you're hopefully just as modest as I am, you'd wear your dress uniform instead of your birthday suit. That small change, although seemingly meaningless, would cause a change on the universe's Hozerhoff Frequency. The Hozerhoff Frequency of a specific universe corresponds to the universe's
default worldline. For example, my universe has a specific Hozerhoff Frequency of 0.000000000."
"So basically, dead zero."
"Well, not exactly. I'll explain later." The Other then drew two branching lines from the straight chalk line. "You know about the many-worlds theory?"
"The one where every single choice causes a split in universes?"
"The worldlines of a universe work like that." He then drew a circle around one of them. "This one is the default worldline, because of how all the divergence points -- those are what we call 'world changing decisions' -- are the ones that are most likely to happen, given the conditions of the universe. The other divergence conditions can happen given enough push and determination of the person causing it, but usually, it will be the default decision of the default worldline of a universe."
"You're kind of losing me here," Alphonse said. The Other merely chuckled. "Oh, trust me, it's confusing alright, but that's only because you're dealing with theoretics here."
"Anyway," he continued, "divergence points cause major shifts to the Hozerhoff frequency of the universe's worldline. Say that I stopped the assassination of JFK. That would cause a
major divergence from the default worldline, because in the default worldline the assassination happened. But in the worldline where I stopped the assassination, it didn't. Hence the frequency would change from 0.000000000 to 0.000369030. That's an actual worldline where JFK lived, by the way."
"Woah. Okay," Alphonse put up a hand. "So basically, the default worldline of a universe follows the
most likely outcomes for the divergence points, right? And if I or someone else causes a major divergence to it, it would follow a different chain of events according to a different worldline with a different frequency, right?"
"Pretty much." He sat down on the chair in front of Alphonse. "Now, this is where we come into play. Because I directly integrated myself into the Oblivion Continuum when I activated it, my very essence was embedded into the Aether, making
us a constant in any universe. This also allows us to 'remember' the Default Worldline of our home universes, and also allows us to integrate the memories of any Alphonse that exists in a different worldline that runs parallel to the Default Worldline of our home universes into our own."
"What happens to the other Alphonse?"
"They
merge with your consciousness. Yours usually become the dominant one though."
"That's reassuring."
"The inhabitants of our universes also has this power, though it is usually less powerful than ours. Memories of different worldlines may manifest as dreams, or nightmares, or half-remembered visions. Some manifest their powers fully, allowing them to fully retain their memories during worldline shifts. Those rare individuals are recruited into STG 11, and eventually becoming part of the Aether Guardian Council if they serve well."
"A sort of universe police?"
"Exactly," he said. "So, to recap, changes at divergence points cause major shifts in worldlines, and small shifts, like the one with what clothing you decide to wear each morning, are smaller changes that can be otherwise ignored. Hence why when I say that I belong to a universe with a Hozerhoff Frequency of 0.000000000, it's not a 'true' dead zero. Past the ninth decimal point, there are constant shifts to the Frequency, causing it to change almost all the time."
"But if I want to visit your worldline, I would enter in all zeros, and the worldline will be more-or-less the one that you remember, right?"
"Yeah."
"But wouldn't I override your memory?"
"Actually, since you're a Prime Alphonse -- that's what we call the Alphonses that belong to the default worldline of their universes -- you'd just thunk in. So there would be two Alphonses, and so on and so forth if our other selves decide that they all want to visit my home universe."
"Oh."
"Hence why we can have a conversation like this without overriding each other," he grinned. "Quite a bit useful too, if you need to be in multiple places at the same time, and simple temporal duplication can't cut it."
"Wait, we can time travel as well!?"
"I can, and many of the Alphonses on the Council can as well. It's a thing that you have to develop on your own, sorry. Each universe is slightly different, so I can't just give you the equations to achieve time travel in my universe -- more likely than not, it wouldn't work for yours."
"Ah, well," Alphonse shrugged. "I don't really find a need to time travel anyway. I'm pretty content living my life with my three wives."
"Three wives?" The Other asked. "Wow, you're a brave one," he chuckled. "I only have Hanna."
"I know," Alphonse groaned. "I had to reinforce my entire body with composite materials in order to survive the lewds. I'm a cyborg."
"I kind of feel bad for being an alien now."
"Why?"
"For me at least, total immortality. Because of my decision to use myself to activate the Oblivion Continuum. Add that to the fact that I'm a genetically-modified super soldier, and I'm tougher than most species in the universe."
"Sheesh, way to rub in my inferiority in my face..."
The Other placed a gentle hand on Alphonse's head. "You'll get there one day. And when you take that first step into the future, and when you see the vision of the universe and see all the wonder that could be, being a human doesn't matter in the long run so long as you have your loved ones by your side."