A linguist uses

native speakers’ intuitions of grammatical sentences to discover the rules of

language, while a logician uses grammatical sentences defined by rules to

construct the rules of a language.

There is no

difference in the way a linguist and logician study a language  

None of these

A linguist uses

the rules of grammar to discover native speakers’ intuitions of grammatical

sentences, while a logician uses constructed grammatical sentences defined by

rules to create rules of language to create

A linguist uses

the rules of grammar to discover native speakers’ intuitions of grammatical

sentences, while a logician uses constructed rules of language to create

grammatical sentences defined by rules.