A completed treebank can help linguists carry out experiments as to how the decision to use one grammatical construction tends to influence the decision to form others, and to try to understand how speakers and writers make decisions as they form sentences.
A completed treebank can help linguists carry out experiments as to how the decision to use one grammatical construction tends to influence the decision to form others. The idea here is not to improve parsing algorithms but to go to the heart of the question of linguistic choice: to try to understand how speakers and writers make decisions as they form sentences.