8. A recommendation system implemented in at least one computing device, comprising: a voiced input interface configured to receive an explicit declaration in the form of speech from a user of a computing device in real time without the computing device prompting the user, the explicit declaration includes a series of words and is configured to influence a subsequent recommendation, the computing device recognizing the explicit declaration by an identifier for an intelligent personal assistant of the user device that begins the explicit declaration; a speech processing module configured to process the series of words of the explicit declaration to generate a record; a rules generator configured to generate a recommendation rule based on the generated record, the recommendation rule including a logical expression; a recommendation engine configured to execute the recommendation rule to generate a recommendation for the user, the recommendation rule defining a manner in which a corresponding recommendation is provided; and an output interface configured to provide the generated recommendation to the user.
12. The recommendation system of claim 8 , wherein the voiced input interface, the speech processing module, the rules generator, and the recommendation engine are located in a user device of the user.