There is plenty of evidence
Evidence. Evidence is everywhere. The key factor here is evidence
of what? This entirely depends on how one views the evidence.
A person with a drug habbit can exhibit many personality characteristics that bring us to determine they "are not themselves" however, we understand it was "they" who "experienced" A drug habit is a physical trauma that affects the brain. It is life and personality altering sometimes permanently and ending in death. Alzheimers is no different in this respect.
We are not talking about guesses, but hard clinical facts. These changes are not just a loss of capability (ie inability to walk, or remember things) but a profound change in the personality of the person involved. Ask someone who works in a Nursing Home.
You are assuming that the ability to express onself is not an ability.
When you were younger your ability to express yourself emotionally was far less than it is now. It will continue to change. It's not magic. It's physical changes that allow you to do this. If these areas are damaged it will set you back or prevent you permanently from having those types of experiences. You may compensate for the loss in very different ways than we "normal" people would consider reasonable.
just research Traumatic Brain Injury or dementia.
I have had a number of first hand experinces. I don't need to google.
My father, 3 neighbors, A woman who was an adopted grandmother "if you will". A friend who died of a rare disease at 37. His last 3 months wer very hard. His wife was hurt and thought it was the disease affecting his brain, because he was mean and kept babbling divource shortly before he went.It broke her heart because he would insist and get violent. We later realized he was trying to free her of the 100,000 in medical expenses he knew would pile up. That poor son of a bitch tried his best to the bitter end. I miss that guy. A good person who died before his time.
We are not talking about guesses, but hard clinical facts. These changes are not just a loss of capability (ie inability to walk, or remember things) but a profound change in the personality of the person involved. Ask someone who works in a Nursing Home
I have first hand experience. That is why I understand that a fact is a fact but how it is interpreted is up to the individual.
A fact: WE DIE.....undisputed.........the question is....what about it? Everything after the basic fact is nothing but opinion and belief.
Are we our brains or are they just like another limb allowing us to to experience the world? No one has the answer. No facts support things either way.
The entire event changes and sometime dramatically before dying. How this "fits just fine" with the concept of a baseline soul you have not explained.
I am not clear where you see a problem.
Soul experiences and expresses: love, hate, yearning, surprise, humbling,joy, embarassment, rage, sorrow,
pitty, remorse... ect. I incorporate all new exerinces and grow in knowledge and understanding.
I am not these things I experience or the things others experience from me. This is my belief. It holds no more water than any other. I recognise that fact.