Show HN: Cerno – CAPTCHA that targets LLM reasoning, not human biology
7 points
1 hour ago
| 11 comments
| cerno.sh
| HN
ceayo
1 minute ago
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am i a robot or is this just way too hard?
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iwalton3
35 minutes ago
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Unfortunately it didn't work for me with my trackball mouse. I tried multiple times. This is very likely also problematic for accessibility without another verification pathway, as assistive devices and screen readers would fail the heuristics too.
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dcliu
23 minutes ago
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Interesting idea but it didn't accept me the first 3-4 times I tried to draw the path on laptop trackpad - going slow led to it failing before I was finished, going fast led to messy paths that were rejected as well. Could something like this work for users with different levels of dexterity?
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kccqzy
21 minutes ago
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I am on a mobile device and I consistently find that my finger is not precise enough to draw a path; it kept complaining about path “not quite right” where my path just touched the wall a little bit. And when my finger literally obscures the screen while drawing, it essentially means I have to memorize an entire path before beginning.

This requires significant spatial thinking skills and short-term memory for a human and it is absolutely unfair for a human to expend that much cognitive power to access a website.

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simlevesque
10 minutes ago
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I did it correctly with a mouse and was rejected. Then I drew a straight line and was rejected. Then I closed the tab.
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opem
44 minutes ago
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this game is a rage bait! Try solving on a mobile device. I don't think an elderly person would ever be able to get through this!
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ge96
14 minutes ago
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Even when I successfully draw a path from green to red, not touching anything it says "Sorry that's not quite right"
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king_phil
23 minutes ago
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Was impossible for me to solve, too, on mobile.
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bestouff
21 minutes ago
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Same. I think an AI would have an easier time than me.
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ahofmann
22 minutes ago
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I managed once to complete the maze, but then it went into "checking" and a spinner forever.
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_diyar
11 minutes ago
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I‘m as confused as the other commenters, especially since it‘s unusable on an iPad.
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CoUHKT57BSe
13 minutes ago
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I'm assuming this is an april fools joke... cause it just don't work at all as a CAPTCHA.
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ranger_danger
4 minutes ago
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The description doesn't make sense either... like "Color-word interference at maze decision points", but there are no colors (or words) at the decision points.
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happytoexplain
17 minutes ago
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Everybody is saying it's impossible on mobile/trackpads, but I couldn't do it with a mouse either :(
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ravenical
13 minutes ago
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Is the idea that if you /pass/, you're an AI?
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Surac
4 minutes ago
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Does not work on a touchscreen. Can’t see maze under finger and smh it always kicks me in the middle of the drawing
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