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.
re: viewtopic.php?p=1345354#p1345354
If I "show a card from my hand", am I choosing what card I show? If so, and I show Hato-Gurama, is my opponent forced to take it since I am unable to discard it from my action's effects? http://rules.l5r.com/EE_Effects#Choices "If the legality of an action depends on its effects, choices within the action must be made in such a way as to make the action legal."
re: viewtopic.php?p=1345354#p1345354
If I "show a card from my hand", am I choosing what card I show? If so, and I show Hato-Gurama, is my opponent forced to take it since I am unable to discard it from my action's effects? http://rules.l5r.com/EE_Effects#Choices "If the legality of an action depends on its effects, choices within the action must be made in such a way as to make the action legal."
Again, the key word here is the person who is making the choice to discard; your opponent, not you. No matter what the opponent picks, YOU never chose to discard it.