I have a brain (A) that consists of certain atoms in a specific combination (C). If I destroy this brain, and afterwards regenerate the brain with the same atoms and combination (C), is this still brain (A) or a different brain?
If I assume that this is the same brain (A), then let's do this thought experiment:
I replace the atoms with different atoms, but of same type in the exact same combination. If I assume this is not brain (A), but brain (B), then there must be a difference in two atoms of same type. Time could also be a difference. However, scientists haven't found any difference in two atoms of same type. So is the consciousness of the new brain (B) the same consciousness as belongs to brain (A), or are they different?