I am thinking for the syntax in nel.
How can we have multiple arguments for something?
It feels rather stupid allowing this really.
It's not very clear, a list is a list in any case.
So maybe we really should just have another
substatement, and forget about powering up
the abstracts, for now? ...?

Well then... in that case.
We only need to make sure scoping works.
Which means, scopes inherit from eachother,
and applying congruent bindings causes an error.
I think.