Sentience is the ability to feel, see, hear, smell, or taste and be responsive to, or conscious of, sense impressions.
What animal on this planet is not sentient?
If stars and humans are made of the same goodies, why aren't stars sentient?
A new daffynition from RiversideRetard.
"All living things are sentient." - RR
In RR's defense, he is as intelligent as a house plant.