 Originally Posted by JoannaB
Ok, I agree that a person with a brain transplant or rather a person with a whole body except for brain transplant would probably have way more of the personality from the brain, however I think due to hormones and body fitness and body image etc, I think that the personality of the person whose brain it was would change drastically, and some of the changes would bring this personality closer to the personality of the person whose body it used to be in some ways because the hormones and body fitness level etc would lead the personality to changes in that direction. So while the person would not be the person whose body it was, they would not be the same personality as the personality in that brain with previous body. Someone who used to know them both might I think see that some of the changes in personality could remind them of the body's owner's previous personality.
Not disagreeing with this, however, it is very much a cop-out. It's dependent on whether or not a person continues to live the same lifestyle as the person who was previously in the body they were placed into, which they could easily not. It proves nothing. Also, any two people can be extremely similar, regardless of whether or not they use the same body. Whoever got the brain transplant could just have easily already have been really similar to the person whose body they're in, but it doesn't mean anything.
 Originally Posted by JoannaB
And I am still not fully convinced about the "core" staying the same. It may or may not. I personally changed so drastically that it is hard to identify what staid the same, and if one does not find specific parts that staid the same, can one truly say that a "core" is the same? What is that core? If it is not moral values and it is not what is important to me, then what is it: what makes me still the same person and not someone else? I am always me in the present, but am I the same one as I was 25 years ago? If I no longer think / feel / judge / value / perceive the same, what is part of that "core"?
This is my belief on it. No two brains are exactly the same, neither from development or even right when they're first made. But that's what's important. Your brain grows and regulates itself from the moment you're born as you gain experience, and that changes the way you express yourself and form your beliefs over time. However, every change that has ever happened to you has come from an outside influence impacting that original brain pattern that was unique to you, and every reaction that will ever happen, even those that would come from being placed in a different body, will be an outcome of this same ever-evolving function. Nothing will ever change your overall brain in the exact same way as it would someone else. That's what makes you "you". No matter how differently your views change over time, it will still always be based on the basic blueprint that is your brain. That's how I see it, anyway. You aren't consciously aware of your brain's blueprint, so you can't always see it just based on the views you currently hold, but that doesn't mean it isn't there. And this is something that will not change with a brain transplant, you will still respond to your new body the way YOU would, not the way its old owner would.
 Originally Posted by JoannaB
Another thought: if someone had amnesia, to the extent of not remembering who they are and who their loved ones are, are they still the same person at the core - their personality would thoroughly change and their prior experience would not consciously influence who they are, so at what point do we say that the core is no longer the same?
I've actually read stories of people with amnesia who remembered nothing about their previous lives and, according to everyone around them, their overall personality did not change. Memories are not held in the entire brain, just parts of it. Many aspects of your brain will still continue to function as they already had even when you have amnesia, and even when you continue to gain new memories, your brain will handle them just like it handled the old one. The way it functions on a basic level, the thing that makes it unique from others, will not have changed just because you can't remember your past.
 Originally Posted by JoannaB
Just to clarify: I am not saying that I believe there is no core, what I am saying is that I am questioning whether there is a core or not, and if there is what is part of that core. I am a Christian so I guess I would prefer to believe that there is a core and call it a soul, but I am an open minded individual who likes to question fundamental stuff like that to reach a better existential understanding. My understanding is that Buddhists believe that the distinction of self versus non-self is a false dichotomy, and part of me sees where they are coming from, while another part of me really wants to reject that and insists that there is a self that is separate and eternal but I do not have the evidence to support that claim.
This is somewhere we differ. I'm not religious, and I don't believe in any self separate from our physical forms.
 Originally Posted by Photolysis
I think it's also worth pointing out that much of the stereotypical "men-think-with-their-dick" behaviour is itself a product of the mind. If a man wants to have sex with a woman he finds attractive, that's a mental decision, not something that magically goes on with his penis without input from the brain.
Sure, hormone levels can influence this and it's not inconceivable that a whole body transplant could lead to a change in sex drive if these were to vary considerably, even if the production of many hormones is regulated by the brain. But that doesn't mean you should take it literally, for the most part.
It's just a phrase though, I don't think anyone actually believes that the dick is doing the thinking....
I hope not, anyways. o.O
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