We must understand but one thing – a person doesn’t truly exist – Where does the universe exist? – one thing is for sure, you wouldn’t say "in my head" – But if every morsel of information, every piece of data didn’t come into your head, well it wouldn’t exist – For example, it is only recently (in the last hundred years I believe since Hubble) that we knew that we were not the only galaxy – so before that time, did other galaxies 100,000,000,000! exist? – the answer is no – for in the mind of the beholder, it was not beholden – once we understand that everything that you perceive must come into your perception, we understand that no two perceptions are similar – the way I see myself and the way you see yourself is different based on a host of factors both personality (soul) based, and communicated via people who you trust like parents, religious leaders etc.