Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. If you’ve spent any time on TikTok lately, you’ve probably seen the smart dog wall test . Someone scoops up their dog (or cat !), carries them face-first toward a wall, and the internet decides whether the pet is smart or not based on whether it sticks its paw out.  A five-second intelligence test you can do in your living room sounds cool. The problem, according to the researchers who actually study animal cognition , is that it doesn’t measure intelligence at all. It’s a reflex, not a sign of intelligence Dr. Murat Sırrı Akosman , a veterinary medicine professor at Afyon Kocatepe University in Turkey, recently published a letter in The Journal of Small Animal Practice calling out the TikTok trend for creating confusion.  Will your dog pass the wall test? See how other pups fared. Experts agree: Don’t do this viral TikTok trend. Video: Will your dog pass the wall test?…