Since GiverOfThePeace isn't giving any sort of answer I decided to make a summary of his arguments for Bobsican. GiverOfThePeace, if you believe that I'm misconstruing your arguments in this summary, then just make you own summary for an accurate depiction of them.
My summary for GiverOfThePeace's arguments:
The mind isn’t a sort of life essence, the heart is. As stated by Xehanort when describing the heart, he calls it his “very essence”.
It's called essence by Kairi:
https://cdn.discordapp.com/attachments/522251946124640268/669829358558380052/20200123_010219.jpg
And one’s heart leaving makes them fade.
Nobodies lacking hearts and not existing has been a concept proven wrong in series:
It’s been revealed that the entire spill was all a lie made by Xemnas to give Organization XIII a false motive.
“There's also the fact that all hearts in existence make up KH, the literal embodiment of light, and there's also Mickey directly stating stuff supporting this.”
>That scan states light and darkness make up everything, nothing about hearts.
“And beings who don't have light/darkness at all are literally nonexistent as we all know, anything”
>Nobodies are beings of darkness, they fade when they lose, use dark powers, etc. The person who stated they don’t have either was Xemnas, who revealed he was lying the entire time.
When someone uses conceptually they’re referring to the idea context of concepts, not the abstraction context. Sora’s in pieces on a scale above the physical one is basically what is said.
“Sora literally states that hearts are all around us.”
>Sora is being metaphorical here. He states right after “you only have to see them for them to become real” so what he’s saying is that the bonds can create a heart.
“- The heart is made up of light and darkness, both making up existence.”
>I would hope that the heart is made up of a concept that you early claimed makes up everything,
“- Nomura himself (aka, Word of God) states that everything in KH has a heart”
>What he specifically was referring to was that everything alive has a heart.
If we define essence, it can have a few different interpretations between like soul and concepts.
es·sence /ˈesəns/ the intrinsic nature or indispensable quality of something, especially something abstract, that determines its character.
Even if you use other dictionaries, they quite closely make similar remarks on essence being an indispensable quality of something such as Oxford and Cambridge
Given how this is, the heart's existence has already been established as being qualitatively superior to the body, the mind, and the soul.
Essence can also refer to concepts such as life force. Which is actually supported by how the heart is seen as a source of life in KH.
"This also supports the fact that the Conceptual Manipulation via strikes should stay because in that instance, the fact the heart is the essence of someone from Xehanort's own words and the game says it was essence being destroyed is enough to show it's literally the heart.”
>This is a huge stretch. Especially when it broke the heart into pieces which caused Kairi’s lifeforce to disappear.
Nobodies have been shown to have hearts so them being destroyed and coming back doesn’t prove abstraction nor a reliancy on said abstraction.
The statement does not say higher dimensional clash, it says a high dimensional clash. These are actually two very different terms.
https://en.wikipedia.org/wiki/Higher-dimensional_algebra
https://en.wikipedia.org/wiki/High-dimensional_statistics
https://www.statisticshowto.com/dimensionality/
It’s a completely different kind of dimensionality from the physics kind.
Under context Xehanort transcends space-time by releasing his heart and time traveling, so you can say the heart itself is under certain condition,s 4D but the only people able to affect it are doing it via hax I.E. Xehanort.
Nothing here provides proof for hearts being abstract, just because you have an object composed of concepts does not mean the object itself is conceptual.
Heartless are tied to the darkness in the fact that they represent it but they do not conceptually embody it. Purebloods are almost never fought in their true forms because they have hearts in them.
What the scene is likely better stating is that there's different laws for those not of that world, so they're still bound by laws, just that the laws have it so specifically one's born from the PoTC world can only be affected by the curse, this is further proven by the fact that Olympus Coliseum entire plot is that Sora is affected by a curse.
Ansem basically confirms he's learned truly nothing about the hearts. Mind you I'm not saying he can't be used as a source but he's clearly admitted his research taught him nothing about the nature of the heart.
What in context Xemnas is saying is that the way Nobodies are formed, which is lack of hearts, is incorrect because they do indeed have hearts
that's what I'm talking about, yes they are formed from hearts leaving them but they are not formed from body and soul like Ansem assumed, they're formed from one's heart, look at Roxas and Namine as the core examples of that. Roxas takes the appearance of Ventus due to his heart within Sora and Namine was birthed from Kairi's heart within Sora.
The heart does not form the Heartless, it's the darkness in them that forms them. That's the entire reason Princesses of Light cannot be turned into Heartless. Because they have no inch of darkness on them.
Nobodies formed from the body and soul is incorrect also since what's directly explained in their creation is that they're formed from someone with a strong heart allowing their empty shell to have a "will of it's own" which is further elaborated on by Xemnas' reveal that it's them re-creating their own heart allowing them to act, feel, have emotions, etc.
The "replacements" in context are also their own hearts, the only true exemptions are Roxas, Xion, and Namine since they're under a special group.