What is Evidence Exchange in debate?

Either team may ask for the evidence behind a claim, and the citing team has to produce the full text promptly. These days that usually means emailing or AirDropping the card, often from documents prepared before the round. The exchange is where miscut evidence gets caught, so read what your opponents send, compare it to their tagline, and turn any discrepancies into an argument. NSDA rules make fabricating or distorting evidence a disqualifying offense, which is why evidence ethics is taught from day one.