Dakota

Blue box: The gems are not in the black box.

White box: This statement is as true as the statement on the black box.

Black box: The gems are in the white box.

This one kinda broke my brain, but I can definitively say that the gems were NOT in the blue box. I don't understand how the statement on the white box can be anything but true, but if it IS true, that would make all three boxes true. Which can't happen of course.