| http://www.w3.org/ns/prov#value | - it is pretty well confirmed that people think the best of themselves, and data gathered by self-survey (like questionnaires) are going to be skewed more positively than data collected through direct observation - particularly for questions where there is a right and a wrong answer. (Things like how many sexual partners have you had? or have you ever stolen from your employer?) Some people ov
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