it is very important to know the source of question one reads. for example one might not want to indulge in questions which are from GMAT Prep or GMAT Powerprep to save himself from having skewed score, etc. Therefore i suggest that it be requirement to post the source as well. when one initializes a thread, he must have radio options with lot of sources with one "other" as option. if posting the source shall not be required, it should be at least suggested/advised by marking in bold red to post the source as well.
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