And some people think they know, but don't even know that they don't know & should really ask.
As usual, there are different interpretations of this and here is Rav Avigdor Miller's opinion:
"You drink up to the point of losing your da’as. You drink just enough. But not enough to lose your da’as. On Purim you have to have da’as. You have to have more da’as on Purim, not less."
You need da'as on this holy day of Purim!
"And you won’t be gaining any da’as lying on the floor waiting for Hatzalah to come."