Ertai: I'm one of those judges that would keep quiet with your question on Psychic Lock. The most you would get out of me is an instruction to read the card and that I will tell you after you have made your choice.
But doesn't that invite error? Not misplay, but actual error? In your example, you tell the player to read Psychic Lock. From that player's experience with where effects are placed on Pokemon, he concludes that the effect is on his active pokemon and therefore goes away upon benching or evolving, unaware that effects can be placed onto the player. The player then benches his active pokemon and does Cosmic Power, putting two cards onto the bottom before his opponent can stop him.
In this example, although easily correctable, you have created a situation where you've lead the player into making an error in the game by not answering with the ruling.
Maybe that's a poor example. The point I'm trying to get at is, by not answering the question, aren't you inviting the player to make an error? You got asked a question about the rules and you've refused to answer. Aren't judges there to answer rules and ruling questions? This makes the judge seem more like a cop, waiting to bust the player for a mistake than make sure the game is played correctly.
Some situations for an opinion, do you answer or respond that you can't say anything until an action requires the knowledge:
1) A player asks how many damage counters confusion places. His Pokemon only has 30 hp remaining and if confusion places 2 damage counters, it'll survive a failed attack.
2) A player asks if using Smash Short against a pokemon with Unown G attached will allow him to look at his players hand and discard any other Unown G cards.
3) A player calls you over, points to the level X card in his hand, and asks you if levelling up will remove the "sand attack effect" from his active pokemon.
4) A player asks if he uses Take Out against a basic pokemon with Unown G attached to it, will Take Out do the damage?
5) A player points to the Metapod, with Poke-Power Emerge, in his hand and asks if he evolves the Caterpie in play into it, can he then attempt the Poke-Power Emerge.
If you reply "I can't answer until something happens," you then get called to another table for a ruling. Except in case 5, when you come back to the game, the action in question has been attempted and the gamestate is no longer correct.
I agree! I think as judges we need to make sure that all players understand how the rules are interpretted. I had a junior player today not know what Unown G did when it attached. I explained it to her. I also had a masters player ask the same question. I answered. The key thing is to not turn "Yes you can do that" into "Yes you SHOULD do that".
I agree with this. Judges are there to make sure people understand the rules and rulings. Also, by not verifying that the action can or cannot be done before the action is done, you invite the players to make a mistake, and then make it again in another game until someone finally catches on. The judge actually creates confusion and doesn't help in preventing game play errors.