Oh, I doubt that based on evidence, the past, your previously flawed arguments and logic, etc., but hey, maybe this time you nailed it. Let's see!
Did you know there is a blue star called: "Alcyone"? (if you do, insert something else you don't know, how many teeth a Tyrannosaurus have etc.)
Yes, I do, so...we'll go with teeth in a t-rex. I don't know how many teeth they have (although I am fairly certain I could made a pretty close guess using math and Fermi estimations). But, before we proceed, I know about t-rexs, I know they have teeth, that they existed, etc.. I have evidence for all of these things, How many teeth they have is a known unknown, meaning it's something I know that I don't know but that I can find out and make a value judgement on the answer to determine whether or not it falls within a range that makes sense.
For instance, I know that if someone said the average t-rex had a billion teeth at any given time, that number is obviously out of a range that makes sense. If the answer is one, that answer is obviously too low.
The point of this is that now knowing how many teeth a t-rex has or should have at any given time is not at all the same thing as not knowing that something even exists. They are two different types of unknowns. One is a known unknown, something I know that I don't know. The other is an unknown unknown, something I don't know that I don't know. So, lets see if you're going to conflate the two....I swear I've not read ahead, this is a guess on my part that you will.
Now, how can you not know this, if you have not thought about it? (have to be something you have not thought about until now as well, of course)
And there is it. There are known unknowns and unknown unknowns. It is 100% possible to not know a thing and not know that you don't know.
Then your definition is redundant, Theist are mostly Atheists except the conscious part of there brains. There feet are atheists, arms, legs etc...
Dude, that doesn't even make sense. No one was suggesting that body parts have belief. That's not in context, doesn't make sense is and isn't something that's even been suggested. It has nothing to do with the fact that babies, lacking belief in god, are atheists.
Seriously, I don't think you've ever learned how to construct a logically valid argument using critical thinking with supporting facts and evidence.