Labels are just about meaningless when it comes to concussions and sub-concussive impacts.

What is important is "Did the bump cause a return or increase of symptoms?"

It is like that argument, "If a tree falls in the forest and there is nobody there to hear it, did it make a sound?"

The more important thing to consider is "If a tree falls in the forest and nobody is there to see it fall, did it really fall?"

Of course it fell. The evidence is that the tree is no longer standing. It is laying on the forest floor.

If you bump your head but do not experience any concussion symptoms, does that mean you did not bump your head?

So, if you bump your head but do not experience concussion symptoms, it is likely not a concussion. It is a sub-concussive impact that can accumulate with other sub-concussive impacts to cause concussion like symptoms.

Now, if that explanation does not give you brain fog, maybe you do not have PCS. LOL