This article was nominated for deletion on 29 December 2011 (UTC). The result of the discussion was speedy keep.

This article is rated Stub-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects:

Robotics Low‑importance This article is within the scope of WikiProject Robotics, a collaborative effort to improve the coverage of Robotics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.RoboticsWikipedia:WikiProject RoboticsTemplate:WikiProject RoboticsRobotics articles Low This article has been rated as Low-importance on the project's importance scale. This article has been marked as needing immediate attention.

• Wikify
• Prose from list
• Tidyup
• Refs

Chaosdruid ( talk) 05:00, 6 March 2011 (UTC) reply

This seems to have been ripped verbatim from course notes (with or without permission?) from course notes on the home page of David Marshall's at Cardiff University ( http://www.cs.cf.ac.uk/Dave/AI2/node188.html) — Preceding unsigned comment added by 66.250.143.158 ( talk) 08:16, 7 October 2011 (UTC) reply

The content of this Wiki page was definitely copied from http://www.cs.cf.ac.uk/Dave/AI2/node188.html , missing all formulas the original article contained. So, the site is a rip-off and of bad quality... — Preceding unsigned comment added by 87.79.30.2 ( talk) 09:40, 11 October 2011 (UTC) reply

A quick search turned up this as the source of this edit, so I have reverted it.-- JohnBlackburne ^words _deeds 21:18, 2 January 2012 (UTC) reply