Well lets not do this in the abstract. I'd never heard of Nemerle until now, but a search on Google Scholar and on Google shows many papers, tutorials and general discussion on the language.

I would think an overview of syntax is an excellent level of detail for an encyclopedia to cover a less common programming language. I certainly see no reason to dismiss that in itself.

Proposing that a timely defense to an AfD nomination is a good test of notability in itself is completely absurd. By itself you'd have to consider it a less reliable indicator of notability than someone writing the article in the first place.

If you're doing a PhD in a topic and you decide to take on a section of wikipedia you have at least be willing to take responsibility for your actions.