I like, if not love, reCAPTCHAs, since it prevents spam in a simple, albeit elegant, way. Provided that the phrase is easily readable and could be easily inputted by humans, it could be a fun experience, knowing that you are helping to encode books currently sponsored by the reCAPTCHA project.
But how do you input this? (This came from Facebook.)
I have no problem with mettexch, but how about A(a)^T? Even Unicode has (currently) no superscript version of T, uppercase or lowercase.
It also looks like it has been LaTeXed. I really love LaTeX.
- reCAPTCHAs make sense (dogsmeat.wordpress.com)
- reCAPTCHA: Awesome Use of Wasted Time That Works (blogs.sitepoint.com)