Sofia Robbio Saravia

@PerleLabs Middle The mortar between bricks is either non-existent or unnaturally uniform, lacking real mortar’s irregularity.

Alright… this is it. Final Human CAPTCHA challenge 👉👉 We saved the best for last. There are 3 images. Only ONE is AI-generated. Your job is to tell us if it's the one on the Left, Middle, or Right. Submit your guesses by Sat, Feb 28 at 11:59pm UTC. As usual we'll be revealing the answers on Sunday! If you got 3+ right, we’ll share how to claim your reward next week.

@PerleLabs Left The color palette of the left image is muted and natural, typical of real photography, while the right images have overly vibrant, artificial colors.

It's the final week of Human CAPTCHA: Round 7 You made it this far… but we’re not going easy on you. One of these is a real photograph of a hot air balloon, the rest is AI-generated. Can you tell which one it is? Respond with Left, Middle, or Right and tell us why below! Submissions close Sat, Feb 28 at 11:59pm UTC. Answers revealed Sunday.

@PerleLabs right The texture of the building's stone facade is incredibly detailed, with subtle variations in color and depth that are characteristic of real masonry, something AI often struggles to replicate without creating a uniform, plastic-like surface.

Perle Human CAPTCHA #6 🏎️ One of these sports car photos is real. The other was generated by AI. Comment “left” or “right” with your guess, and tell us why 👀 Submissions close Sat, Feb 21 at 11:59pm UTC. Answers revealed Sunday.

@PerleLabs right The right one looks natural and consistent, i think the left has slight distortions in the buildings and reflections.

Perle Human CAPTCHA #5 📸 Let’s keep your captcha streaks alive. One of these vacation photos is real, and one was generated by AI. Which one is real? Reply "left" or "right" and explain why ↓ This week's submissions close Sat, Feb 21th at 11:59pm UTC. Both answers will be revealed on Sunday.

@PerleLabs Left The left picture feels more authentic. The background and colors are less dramatic, more like a normal wildlife or zoo photo.

Perle Human CAPTCHA #4 It's time to put your human judgement to the test again. One of these images of a tiger is a real photograph, one was generated by AI. Which one is real? Reply "left" or "right" and tell us why ↓ This week's submissions close Sat, Feb 14th at 11:59pm UTC. Both answers will be revealed on Sunday 👀

@PerleLabs left The apple’s highlight isn’t perfectly smooth, it subtly breaks due to tiny surface imperfections. Real fruit rarely reflects light uniformly.

Perle Human CAPTCHA #3 📷 One of these images of fruit is a real photograph, one was generated by AI. Which one is real? Reply "left" or "right" and why 👇 You have until Sat, Feb 14th at 11:59pm UTC. This week's answers will be revealed on Sunday.

@PerleLabs AI The overly balanced composition of mountains, lake, trees, and deer is a classic sign of AI’s algorithmic pursuit of visual harmony, lacking a human artist’s intentional asymmetry.

Perle Human CAPTCHA Round 2 ✌️ Was this landscape art created by a real artist, or AI generated? Reply with "Human" or "AI" and tell us why! Deadline is Sat, Feb 7th at 11:59pm UTC. This week's answers will be revealed on Sunday. PS: Use your own judgement and trust your instincts!

@PerleLabs A The vertical sign on the right has blurry, distorted characters that don’t match the appearance of real Japanese-style signs, a common flaw in AI-generated text.

Perle Human CAPTCHA Round 1 Was this photo taken by a real person or generated by AI? 📸 Reply with a letter and tell us why: H = Human A = AI Deadline to submit is Sun, Feb 7th at 11:59pm UTC. It's go time 👇

Think you can outsmart AI? 😏 Perle's Human CAPTCHA is here. > Test your ability to detect AI-generated content > 2 questions every week > Get 3+ correct across 4 weeks to earn an exclusive badge The real AI challenge begins. First challenge below.

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