=> quora.com/search?q=marcus-l-endicott+vicarious
Versions of this question seem to get asked over and over again on Quora, above. Generally, conversational AI and in particular question answering systems are built on top of question/answer pairs, and machine learning can be applied to question/answer pairs. The biggest stumbling block at the moment is the conspicuous absence of a publicly available Quora API. Quora co-founder Adam D’Angelo may already be at work on this through his stake in Vicarious (company).