After each challenge, one member from each tribe will be selected. They will meet with one another privately where further details will be discussed.
The 2 selected will be kept ENTIRELY secret from the rest of the group. What goes down in this meeting is entirely private. What you choose to share is up to you. That's if you even reveal yourself. But the 2 people who are chosen by random WILL know they are both there.
Do you work with this person from the other tribe? Create cross-tribe alliances? Or will you share information with your tribemates, solidifying bonds at home base? You decide what happens. This is your game.