Mind Performance Hacks by Ron Hale-Evans The unconfirmed error reports are from readers. They have not yet been approved or disproved by the author or editor and represent solely the opinion of the reader. Here's a key to the markup: [page-number]: serious technical mistake {page-number}: minor technical mistake : important language/formatting problem (page-number): language change or minor formatting problem ?page-number?: reader question or request for clarification This page was updated February 29, 2008. UNCONFIRMED errors and comments from readers: (91) See also - 1st bullet point; http://www.ideagenerationmethods.com/methods/card-decks.html is a dead link - leads to a domain placeholder page. {167} 3rd paragraph; When finding the century-item for any Gregorian date, the algorithm given starts with integer-dividing the first two digits of the year by 4, followed by getting the "mod 7" of this intermediate result. However, this does not correspond to the numbers given in the example, and does not give the results that are found in table 4-11. The algorithm should instead start with getting the "modulo 4" (rather than integer division) of the first two digits of the year, and the example should be altered to correspond to this.