What's a Self?

...a soul?
...a set of neuronal activity?
...an illusion?
...a ghost in a machine?
...the body, the brain, &
the whole enchilada?

Memories can be false,
and some always are.

Thoughts can be illusory,
and some always are.

Feelings can be flighty & fickle,
and some always are.

If one loses a little toe,
is one a diminished self,
or still whole?

What about if one loses
a pinky toe-sized mass of brain?

So many possibilities:

...death,
...changed personality,
...emotionlessness,
...speech pathologies,
...blindness,
...memory loss,
...coma,
...no discernable change,
and so on.

What's a Self?
...a dog?
...an embryo?
...an AI?
...an extraterrestrial?

What is a self?

Am I a self?