Yes, I’m drawing a blank, which means I have no idea

It seems that I do this a lot these days, perhaps one of the perils of being a writer

But…

Using blank in a story doesn’t necessarily convey the antagonist is clueless, more likely he or she just used one in a gun, put there by a person who didn’t want to get shot.

No, still drawing a blank on this one.

A blank space means there’s nothing in it, and you see a lot of these in crosswords and sudoku, even when the user has been toiling for hours

I’m thinking anyone who met me might misinterpret my blank expression, well, it’s not too expressive in the first place

Perhaps before the coin becomes a coin; it is a piece of blank metal to begin with.  How good would it be to get a one-sided coin, that’d be worth a lot?

And the very worst description of blank; having a blank piece of paper in front of you, and you really are drawing a blank!