I have a big DOUBT

Somebody here knows what is:

Grammar Tacitness

Grammar Equality/Parity (if you know spanish, in my language is Igualdad Gramática).

I suppose they're theories about grammar. Just as Chonsky did with the grammar universality.

Sorry if my english isn't too god af everyone would expect from a page like this (but I'm still learning it).

Thanks in advance. Ciao.