The tasks are very easy for humans. Out of the 6 tasks assigned when I opened the web page, I got all of them correct on the first try. Maybe if you run into s

The tasks are very easy for humans. Out of the 6 tasks assigned when I opened the web page, I got all of them correct on the first try. Maybe if you run into some exceptionally difficult tasks it might not be 100%, but there's no way the challenge can be called unfair because it's too difficult for humans too.