This is in the Compendium:
Q. If I use Smeargle's "Portrait" Poke-POWER and find "Engineer's Adjustments" in my opponent's hand, do I have to use it if I have an Energy card in my hand?
A. Yes, if you have an energy card and you choose Engineer's Adjustments, you have to discard the energy and draw 4 cards. (Dec 9, 2010 PUI Rules Team; Mar 17, 2011 PUI Rules Team)
The hand is private information. How can you prove you do not have an energy other than showing your hand to your opponent? The Roast Reveal / Power Spray was easy, just show the energy that you were about to use so that you were not accused of drawing out the opponent's Power Spray. This is different because you have to prove you do NOT have the card.
How should I judge this?
Q. If I use Smeargle's "Portrait" Poke-POWER and find "Engineer's Adjustments" in my opponent's hand, do I have to use it if I have an Energy card in my hand?
A. Yes, if you have an energy card and you choose Engineer's Adjustments, you have to discard the energy and draw 4 cards. (Dec 9, 2010 PUI Rules Team; Mar 17, 2011 PUI Rules Team)
The hand is private information. How can you prove you do not have an energy other than showing your hand to your opponent? The Roast Reveal / Power Spray was easy, just show the energy that you were about to use so that you were not accused of drawing out the opponent's Power Spray. This is different because you have to prove you do NOT have the card.
How should I judge this?