Oh, the wonders of the web! It never fails to amaze us and mess with our minds. Just when you think you’ve seen it all, someone comes up with something new designed to boggle our brains and spark endless debates on social media. The latest addition to this ongoing series of online illusions comes from the talented Swiss photographer Tiziana Vergari.

She recently posted a photo on Instagram that’s already racked up around 700 comments, most of which are people trying to figure out how many women are actually in the picture. Is it three? Four? Two? Are they twins? And where exactly is the mirror? No one seems to agree.

To clear up the confusion, Vergari herself jumped into the comments section, explaining that the photo shows two sisters, both of whom are looking into mirrors. The girl closest to the camera is gazing into a mirror just out of the frame, which adds to the illusion’s complexity. When you take a closer look, the answer becomes clear: there are indeed just two girls sitting beside each other, between the mirrors.

By matching their facial features and poses with the reflections in the distance, you can see that it’s simply two people. However, some viewers still claimed that the illusion featured dozens of different women or was the result of special effects.