You were saying?
And saying that all those who don't affirm their belief in a deity makes them automatically atheist is incorrect. There are those who has not decided their position on whether or not there is a god. Those people are referred to as "agnostic".
Agnostics are the middle ground between theists and atheists. They are the ones who are "on the fence".
Things are determined by the groups they are in all the time, even if the determining factor is one of the criteria in order to be considered part of that group. A Republican is a Republican because they have identified themselves as one in addition to the other political views they hold.
A group is a group. There's no falsehood about it.
Part of the definition of an invertebrate is that they are animal, not plant, not anything other than life. So yeah, the lifeform criteria stands until there has been a discovery made that shows a thing that has vertebrae and has never been living. And what do you mean that's what the problem is by learning from groups? When you went to school, was every class taught by the same teacher to all the students in the school regardless of grade? Grouping allows one to be able to focus on one aspect while not focusing on others. Going back to the school example, students are grouped into grades, from that, each grade also gets divided up on the subject of class they are currently in. And even those who are studying the same subject may be in an honors class, regular or remedial.
And, last I checked, sharks have vertebrae. So your argument, with the exception of my misnomer (saying backbone instead of vertebrae), is invalid. And being that, if it is real, God has no known physical form, it could not possibly be known as living or nonliving, to say nothing of whether it has vertebrae. And again, a requirement of vertebrate/invertebrate is whether or not the thing in question is an animal or not. Being that mushrooms, bacteria, and plants are not animals, they can't even be considered as to whether or not they are vertebrates.