What he's trying to say is that if you know 3 people playing at a table, you can have 1 person be the actual player and the 3 otehr people are relaying what there cards were to you. With that, the 1 person who was chosen to really play will know what 6 other cards in the deck were actually played. This doesn't really help you out a whole lot, but there are definately situations that it can help. For example, if you draw two 7's, its rather tricky to konw whether to go at it or not in texas hold em (especially no limit). Theres seven cards out there that in pairs, are higher then your pair of 7's. What your really hoping for (especially if 2 or 3 people stay in the pot with you) is a third seven to pop up to give you a good three of a kind. Now, if you have access to six more cards because of your friends and 2 of them happen to have crumby hands that include 7's, your most likely going to fold because now there's no way you will be able to make that three of a kind since the other two 7's are being thrown out by your friends.