:The WP article was unfortunately not adequately fact-checked.  His daughter, who does not live near her deceased father, has long made this claim and statement, and it has never been substantiated.  It is disputed by Dr. Engelbart's wife, who had the responsibility for (and the most intimate knowledge of) Dr. Engelbart's health.  It is reckless that the WP included this unsubstantiated claim in their article without corroboration by Mrs. Engelbart.  I have been in contact with her, and she says that the Alzheimer's statement is false and vehemently disagrees with its inclusion in the Wiki article.  Please see my comment above from 18 March 2009.  Without factual support the Alzheimer's reference should be removed .    Bill Duvall