What does rule 108 mean when it says all Game Objects in the collective Play Areas are Public Information, given that deck and hand contents are clearly not public?

Ruling: Rule 108 provides a default that Game Objects in Play Areas are public information, but this is overridden by specific rules for certain zones like the main deck and hand. The existence of Game Objects (such as card count) is public information, but the specific contents/information of cards in private zones like deck and hand are not.

Nuances:

• Main deck cards in any zone are still Game Objects even if their contents aren't public
• The card count of the hand is explicitly stated as public, though this explicit statement is oddly not provided for other zones like the main deck (though it would logically apply)
• Rules 108.1 and 108.2 further define what rule 108 means in practice