> - Is there a point at which replacing your organs replaces You? This is called the Ship of Theseus and is a pretty deep problem. Not really. Your molecules t

> - Is there a point at which replacing your organs replaces You? This is called the Ship of Theseus and is a pretty deep problem. Not really. Your molecules turn over in a matter of days to years anyway (depending on the tissue and compounds in question). All that remains is information encoded in larger structures that are retained across that turnover. And the largest part of that is in the brain. > - Why is our perceptible self the only thing that should determine our sense of identity? Aren’t there many aspects of our body and mind that aren’t we aren’t aware of on a conscious level? By perceptible I meant observable in one way or another, even parameters that are only subconsciously noticeable such as hormonal balance, gut flora signalling, DNA methylation, immune memory or whatever is important to the stateful system of the body. These considerations add complexity if you want a high-fidelity replacement but they're still far fewer variables than the state maintained in your brain. > - Is the ability to be conscious or communicate via language the sole determiner of a thing’s existence? If I put my head on your body, what is this new thing? Just me? My head on your body? Even if your cells and body continue to exist, with anything like tattoos or personal elements. Etc. I would say it's mostly you, a little me. Consider it as an exercise in tallying the number of non-redundant bits persistently stored in something. Its kolmogorov complexity. The body carries a smaller fraction of that.