One of those human detector systems is where you have to type in the letters and numbers as seen in a distorted image.
Here’s one from earlier today. I knew I’d fail to get it right, so I took a screen shot before hitting the submit button.
Gee-oh-five-dee? Six-zero-five-dee? Gee-zero-five-dee? Six-oh-five-dee?
Maybe I’m a Cylon? They look like us now, you know.