pop quiz:
does holder = owner+controler?
Since this is a quiz, I will add my response to the other student's.
If I bring a certain card to a game, then it is
my card. I
own it. Showing it to other players may give them an opportunity to
hold my card, but it is still
mine.
During the course of the game, strange circumstances may occur, and my opponent may end up having my card on his side of the table. Any special abilities that are on my card that say "your" will only ever work for me, since I am the only owner of that card, but the card has to be on my side of the table for those abilities to work. However, any special abilities on that card that say "holder" could work for either of us when we have the card on our side of the table.