<P> The astute bow tie wearing software agent in the video has been the center of quite a few heated discussions in the domain of human--computer interaction . It was criticized as being an unrealistic portrayal of the capacities of any software agent in the foreseeable future, or even in a distant future . Some user interface professionals like Ben Shneiderman of the University of Maryland, College Park have also criticized its use of a human likeness for giving a misleading idea of the nature of any interaction with a computer, present or future . </P> <P> Some visions put forth by proponents of the Semantic Web have been likened to that of the Knowledge Navigator by Marshall and Shipman, who argue that some of these visions "ignore the difficulty of scaling knowledge - based systems to reason across domains, like Apple's Knowledge Navigator," and conclude that, as of 2003, "scenarios of the complexity of (a previously quoted) Knowledge Navigator - like approach to interacting with people and things in the world seem unlikely ." </P> <P> The notion of Siri was firmly planted at Apple 25 years ago though "Knowledge Navigator" with the voice of the assistant was only a concept prototype . In October 2011, Apple relaunched Siri, a voice activated personal assistant software vaguely similar to that aspect of the Knowledge Navigator . </P>

What is the name of the knowledge navigator in built into apple's ios