Are some of you really ignorant of the differences between living things and non-living things?
Non-living things continue moving in the same direction unless some exterior force acts on it.
Living organisms are sensitive to their nutritional needs and their need to avoid danger.
Living things change directions based on their needs.
Non-living things don't have needs.
If you break a rock in two that rock ceases to exist and you have two rocks with similar composition but separate trajectories.
Living things can be cut in pieces and it still has its cellular identity.
Living things can choose the direction in which it moves. Rocks can't choose direction. If a rock is impacted by another rock it will either move in the opposite direction of the impact force or it will break apart and no longer exist.
Living organsims maintain their identity over time even though the materials that it is made of come and go.
You also can't speak about a brain in a bottle. That is pure fiction - not even science fiction. Brains need to be viewed as having a body connected to it. That body has needs and the brain, along with muscle, sense organs, and guts each serve their part in a functioning organism.
Organisms differ from rocks in kind not degree.