The rules say,
When playing card 2, the player may choose to add the white "NO" token to any card on the table including a card that already has a "No" token on it.
Does that mean you must play the white "No" token immediately on an already face-up card?
We've been playing that you can hold the token to use later on. Are we playing it wrong, you think? Or does the "may" above mean the player may choose to play it now, OR hold it for later?