You know...regarding the PoH,its likely impossible that Alice was alive during Birth by Sleep,i mean she is like 7 years old.So could it be that when a PoH dies,a new one is born?its said that the world needs both light and darkness ,so a person with no darkness in her heart should not be able to exist,yet they do.Maybe they exist bacause they need to.Because their hearts can open the door to the darkness.And the darkness is where Kingdom Hearts is,kingdom hearts is the light in the darkness(kinda like heartless,whose bodies are made of pure darknees but due to them having hearts even if theyre corrupted,they still have a little light in them even if its just faint,like Sora said in every heart is a little light that never goes out).So the PoH need to exist so there can always be a way to reach this light if its needed.What do you think?Is it likely that during Birth by sleep Alice´s place was taken by another girl who maybe died during the events,and when she died Alice ws born?