Yes that's correct - sentience is a relative, assigned quality. We recognize an appearance as possessing the qualities of sentience, but this is a purely subjective experience.

This means, literally, that sentience is relative - just like time. Our perception of sentience is completely constrained by our perspective.

This means that 'sentience' is just like Schrodinger's cat, and all things exist in a state which is both sentient and not sentient at the same time.

This is proof that matter exists within consciousness, not that consciousness arises from the activity of matter