I think you're forgetting that you were the one who brought up usage with respect to babies as support for your position in the first place. It was your argument that I was addressing when I pointed out that there could very well be reasons that people don't go around saying "babies are atheists!" that have nothing to do with them actually thinking "babies aren't atheists!"I think that you are so wedded to your definition that you can't see the point I was making. You were claiming that people do not call babies atheists because there is no reason to do so. I was pointing out that it could be because they have a reason not to--the label doesn't apply. Most people think of theists and atheists as people who advocate a position on the existence of gods. That label would not apply to babies or people who have no concept of gods.
I was raising a problem that casts doubt on your argument. You trying to cast doubt on the problem that I pointed out doesn't magically make your argument a sound one.
Since you seem to have retreated from your initial position that the lack of people describing babies as atheists is meaningful (I suspect because it would imply that the lack of people describing babies as "not atheists" is meaningful as well, which hurts your argument) and have instead apparently switched to something more like "maybe it's meaningful, maybe it's not, but you can't say for sure that it's not meaningful", can we just agree to set the matter of usage with respect to babies aside as irrelevant?