pronoun problem
The passage below is from ‘the Blank Slate’ by Steven Pinker.
http://evolbiol.ru/blankslate/blankslate.htm As linguists have long known, sign languages are organized much like spoken languages. They use words, a grammar, and even phonological rules that combine meaningless gestures into meaningful signs, just as phonological rules in spoken languages combine meaningless sounds into meaningful words. Spoken languages, moreover, are partly modular: the representations for words and rules can be distinguished from the input-output systems that connect them to the ears and the mouth. I'd like to ask a question regarding the underlined 'them'.
It seems to refer to 'representations' in a way, and also 'words and rules' in another. (Now I think it should somehow represent 'representations', though.)
Regards.