Sumitra refers to Wikipedia. Social scientists should be aware of the   
"openness" of this so-called encyclopedia. I keep finding  factual   
errors and editorialised histories in my students' papers for which   
they gave W. as the source. My latest course outline requires   
corroborating evidence to accompany references to Wikipedia entries.  
The widespread lack of W's reliability was, again, illustrated a few   
days ago when U.S. Congressional staff was found to have changed   
biographies of  their political masters. Disinformation for the   
masses (or whatever Orwell called it)?  
  
Jesse Vorst