If you select some of the keywords (e.g. "brain" and "linguistic") for a user, you get posts they made related to those keywords. I think the results are okay i

If you select some of the keywords (e.g. "brain" and "linguistic") for a user, you get posts they made related to those keywords. I think the results are okay in terms of relevance to the query, but of course "posting about a topic" and "being knowledgeable about a topic" are different things. Now if this tool could distinguish posts that sound like they were written by a layman from those made by an expert...