For the record, sentience is simply the capacity to receive sensory impressions.
Indeed, as Webster defines it: feeling or sensation as distinguished from perception and thought
All dogs are sentient. Mice, too. Ants as well. Fish. Birds.
Too often, atheists appear to think of themselves as capable of knowing all that is possible of being known, so that it's literally inconceivable to them that a higher form of intellect than their own might exist, though that that certainly moves one beyond mere sentience. I again have to wonder, though, why, given the gulf between the intellect of a man and a lower mammal, it's so inconceivable to them that in the vast reaches of the universe there might be intellects that dwarf their own.
But of course if there are intellects that are to theirs what theirs is to a cat's, that would mean that such intellects could understand truths that atheists couldn't even begin dimly to conceive.
Indeed, isn't it a kind of magical thinking on their part to put themselves on that kind of pedestal? The absolute limits of the universal possibilities of the mind reside in you? Really?
Anyway, it's hardly a semantic quibble to observe that sentience means nothing like self-reflection. Since sentience comes up several times in atheist discourse, in particular as the cut-off point for who lives and who's disposable, it would seem to me to be morally imperative to know what the word means. And to note that sentience never saved a cow or a spider. It's odd to make it THE primary criterion for why older human lives are more valuable than younger lives.
I still come back to the observation, which atheists more or less confirm all the time, that it is inconceivable to many atheists at some level that there could be ANY intelligence, material or divine, that could be so much greater than their own that it could perceive and contemplate truths that their minds cannot. I don't have to rebut that viewpoint; they're certainly welcome to it, and they may very well be right: they may, as human beings, be the absolute zenith of all possible intellects in all possible worlds. I simply find the alternative notion--that for all humankind's glories, it's easily conceivable that there are other intelligences far, far greater than our own--more persuasive.
I do think there is a religious worldview behind these two positions, of course. In the view that if it can't be explained to an atheist's complete satisfaction it must not be true, there is a distinct species of pride. (Never mind whether one sees pride as a virtue or a vice.) In my view, that I don't assume that the human mind is capable of understanding all there is that could be understand by a mind, and I don't assume that all that can be perceived is certainly perceptible by the handful of senses I've been graced with, there is the opposite emphasis on humility.
Pride and humility, two very different approaches to any problem.