If you are looking for an answer to the question What is Artificial Intelligence? and you only have a minute, then here's the definition the Association for the Advancement of Artificial Intelligence offers on its home page: "the scientific understanding of the mechanisms underlying thought and intelligent behavior and their embodiment in machines."
However, if you are fortunate enough to have more than a minute, then please get ready to embark upon an exciting journey exploring AI (but beware, it could last a lifetime) …
Horning, J. J.
Abstract: Grammatical inference is an inductive process of discovering an acceptable grammar for a language, on the basis of finite samples from the language. The study has the goals of devising useful inference procedures and of demonstrating a sound formal basis for such procedures. It states the general grammatical inference problem for formal languages, reviews previous work, establishes definitions and notation, and states a position on evaluation measures. It indicates a solution for a particular class of grammatical inference problems, based on an assumed probabilistic structure.