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.