Take a look at this image of a girl that has been confusing people since before #thedress.
Does this girl have three legs?
According to the 2012 date, this picture has been confusing people for years, but it resurfaced after imgur user AMassiveTRexHoldingaBaby posted the pic with the caption, "Legit had to stare at this pic for a full minute before my brain told me what was going on."
Our culture's recent obsession with optical illusions drew thousands of commentors freaking out about this three legged-girl, and when you get that many eyes on that many legs, you're going to draw out the truth.
Have you figured it out yet?
This girl is actually holding a vase that freakishly matches up with her legs. The top of the vase is the color of her dress and the bottom looks like a an additional limb. Even the shadow on the right side of the vase looks like a could-be leg crease.
Its one of those things that, once you see it, you can't believe how you ever couldn't. And yet, it took us five years to figure out.