All natural languages seem to distinguish at the semantic level between count nouns (CNs) and mass nouns (MNs). Some natural languages, like English, mark the distinction at the syntactic level. Prototypical of CNs is ‘dog’ and of MNs is ‘matter’. One syntactic difference is that usually CNs take the plural (‘dogs’) whereas MNs do not. Other syntactic distinctions relate to the determiners and quantifiers. One can say a dog, another dog, many dogs, two dogs, etc.; one cannot correctly say *a matter, *another matter, *many matter, *two matter, etc.

请问：（1）mass nouns等于uncountable nouns吗？（2）another matter真的是语法错误吗？