The card system was developed by Adam Elga, Liz Harman, and Ned Markosian in 2010. The main purpose of the card system is to ensure that every participant has an equal chance to be called on during discussion. The system helps to level the playing field, so that factors such as seniority, gender, race, aggressiveness, etc., do not play a role in determining who gets to talk the most during the discussion.
Here’s how the card system works. Each conference participant will receive five color-coded, single-use "question cards" with her or his name on them. Chairs of sessions will use the ranking of the cards to determine who to call on during Q&A. (In the case of a tie, the chair will have to use some fair tie-breaker of their choosing.)
The ranking of the cards is as follows:
red > green > orange > yellow > blue > hand-with-no-card
If you want to ask a question and you'd like to use a card, just raise that card when attempting to get called on to ask your question. If you are called on, you'll pass your card to the front of the room, where it will be collected by the chair.
The cards will be distributed before the first session on Monday morning. Please arrive for this session about 30 minutes early so you’ll have time to collect your cards. (If you don’t manage to collect your cards before the first session, no worries: you can always just use a hand during that session, and then collect your cards after the session is over.)
The cards are non-transferable, and you get to use each one only once. Also, if you lose your cards you will have to use an empty hand whenever you want to get called on – so please don't lose your cards!