There is generally provided a hosted question-and-answer system utilising machine learning semantic analysis and other computational techniques including to intelligently optimise query uniformity, automate answering and optimise answer quality. In one form, there is provided a system comprising: an interface for receiving a query string from an electronic device; a query semantic correlator controller configured for: generating a query semantic representation of the query string; and correlating the query semantic representation with earlier query semantic representations, and if a matching query semantic representation is found, sending a query string associated with the matching query semantic representation to the electronic device; an answer semantic correlator controller configured for: correlating the query semantic representation with earlier answer semantic representations, and if a matching answer semantic representation is found, sending an answer string associated with the matching answer semantic representation to the electronic device; and a profile correlator controller configured for: if no matching answer semantic representation is found, correlating the query semantic representation with user profile data representations, and if a matching user profile data representation is found, sending the query string to an electronic device associated with a user profile associated with the matching user profile data representation.