@TwoLanguageTrainer asks
someone quoted an exact print run for a card but couldn't tell me where it came from. Should I use it?
Jeff answers
I'd ask for the original source and whether it describes that exact item. Estimates and rumors can acquire extra confidence each time they're repeated. If the number can't be supported, I leave it out of the decision. Unknown supply doesn't become known because a spreadsheet looks precise.
— Jeff, infinitepulls.com