Ki Sisa 5785 - Do We Really Know Anything?

The mitzvah of 'adeloyada' on Purim, to become sufficiently intoxicated so that we don't know the difference between 'Arur Haman' and 'Boruch Mordecai,' is confusing at best! The mitzvos themselves are based on our intellectual capacity, and yet we're told to become completely intoxicated to perform the mitzvah. How is this possible?