What lore do you ignore?

[Iscah]

Seeing as this has turned into the debate space for the Sundering again, I have to note that the EE3 page on alphabets (page 52) and renewed discussion of it in light of the "hypothetical" proto-alphabet popping up in Dawntrail, if it is accurate that both worlds' writing systems came from a common ancestor then that seems to be a strong point in favour of the Sundering not wiping out all knowledge even if precise memories were lost, and thus leans more towards "same people with weakened aether" over "reverted to primordial slime".

Edit to add: This seems to fit in conjunction with other elements leaning that way within FFXIV's actual canon, like Emet demonstrating the concept of sundering with an illusion of two identical Rynes, and that he makes no effort to horrify us with tales of people being physically reduced to something inhuman, and seems to imply that the worst of the effects was a loss of memory but not so much that they couldn't still draw an accurate and sequential history of the conflict.