What's interesting is that that is a question that a person could answer (in context) quite easily. But can a google search or a computer answer the same question posed the same way? It can but only if the question or similar has come up before in some way. But if not it would take a human to figure it out.
For example if I said 'what is the name of the person who was initially involved in HN that no longer makes comments' most of us would know it is PG (as the likely person). But do a search and not include any more info and the answer does not exist.