At first glance, it looks incredibly simple.
A grid full of lowercase letters, almost all of them “d,” with a challenge printed at the top:
“How many b’s can you see here?”
Easy, right?
You scan the image, spot a few obvious “b” letters hidden among the sea of “d” characters, make a quick count, and feel confident in your answer.
But then someone tells you that your count is wrong.
So you look again.
And suddenly you notice another one.
Then another.
Then yet another that somehow escaped your
