Question for Destructive Priorities (L5R rules board)

A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.

A player, 27 June 2011

I happened to overhear a conversation at the Kansas City Kotei.

Destructive Priorities Kata Political You have the ability, "Political Reaction: Before you gain Honor during your turn, bow your performing Courtier: Negate the gain. Choose a player. He loses 2 Honor." Limited: Put this card into play. Discard all your other Katas

Someone reasoned that since the part of the limited ability said "Discard all your other katas" that you had to discard the ones in your hand as well. Well me and my friends were talking about it, because usually we use one of these katas, the play another to use the second one, but with the way the person at kotei reasoned you couldnt put one into play and keep one in your hand.

Long story short me and my friends reasoned that since your hand is face down and there is no way to check or keep track of what is in your hand other than card effect, would you have to discard any other katas from your hand?

Zen Faulkes (rules official), 28 June 2011

Someone reasoned that since the part of the limited ability said "Discard all your other katas" that you had to discard the ones in your hand as well.

Not so.

http://rules.l5r.com/CE_Glossary_D#Discard: "An effect that refers to discarding 'all cards' of a given type or keyword refers, by default, only to cards in play." Added emphasis.

On: Destructive Priorities