Belz...
Fiend God
No, it does not necessarily mean they are sentient, in the sense that we are. If consciousness were a base property, as I suggest, then it would depend on how it was configured in relation to everything else in order to determine whether something was sentient or not.
Allright. That's something we can build on, now. However, could you elaborate on how such a base property would work, or exactly what function it would have ? That is, what would a thing with consciousness do that it couldn't do without consciousness, and how would it do that ?