I say "In response, spin the top" i.e. Pay 1 mana to look at the top 3 cards of my library and put them back in any order.
Have I missed my Counterbalance trigger?
I am looking for an answer based on the Missed Triggers Policy that relates to tournament play of Competitive Rules Enforcement Level (REL) or higher. I would like to know whether, by activating my Divining Top without acknowledging the trigger, I have implicitly "chosen" not to reveal the top card of my library.