In 2v2 games, can you show your hand to your teammate?

Ruling: Yes, you can show your hand to your teammate freely in 2v2 games. This is not considered "revealing" cards for the purposes of card effects that care about when cards get revealed.

Nuances:

• Hands are still considered private information under the rules
• You can even show your hand to your opponents if you want to
• Showing cards from your hand is different from "Revealing" cards (which is a specific game term for card effects)