On captchas.

You know those silly graphics-of-distorted-letters that are used as anti-robot devices in many web contexts? They are now widespread enough that we can start to expect Batesian mimics. In particular, I expect to see captchas that are not randomly generated (at significant processor cost) but instead simply cycle through a small set of pregenerated images. All you need is enough varieties to convince an opportunistic spammer that you are a Monarch butterfly...

On captchas.

You know those silly graphics-of-distorted-letters that are used as anti-robot devices in many web contexts? They are now widespread enough that we can start to expect Batesian mimics. In particular, I expect to see captchas that are not randomly generated (at significant processor cost) but instead simply cycle through a small set of pregenerated images. All you need is enough varieties to convince an opportunistic spammer that you are a Monarch butterfly...