You used it here:
http://www.freerepublic.com/focus/chat/2166563/posts?q=1&;page=614#614
For the Wikipedia policy, see Wikipedia:PRIMARY. Primary source[1][2] is a term used in a number of disciplines. In historiography, a primary source (also called original source) is a document, recording or other source of information(paper, picture,....etc) that was created at the time being studied, by an authoritative source, usually one with direct personal knowledge of the events being described. It serves as an original source of information about the topic. Primary sources are distinguished from secondary sources, which often cite, comment on, or build upon primary sources.[3]
I realized, after I’d clicked Post, that I should have typed:
I don’t recall reading Wiki
ABOUT TYPE I AND TYPE II errors.