Why is it weird that it wasn't mentioned? What does it have to do with the subject of the article? It didn't mention that he wears glasses or is a coeliac either. So what?

lol, yes

What's wrong with Dumbledore being gay and that never being mentioned? Was his gayness intrinsic to the story? Was he left handed? Was he coeliac? Did he have diabetes? Was he a stamp collector? Who knows? Who cares? It never came up because it wasn't relevant.

Egg white is called Albumen, not Albumin. Albumin is the protein it contains.

Egg white is called albumen. Albumin is the protein it contains.

There is no hard and fast answer to that one. Sometimes you’ll be picking stuff up yourself. However, things that can work include:

You fundamentally misunderstand a child’s mind and its capabilities. Children are not little adults. They do not have the full range of emotion, intellect and understanding to behave in the ways you are attributing to them.