>>17
A situation almost directly opposed to the one in actual discussion
Yes, which makes
>>12's comment even more beside the point. The fact of the matter is that the size of the input domain does not significantly impact the difficulty of successfully OCRing text. What does impact it is glyph similarity, which you agree is not an issue with real-world CAPTCHA.
the implementor probably went to the same special school that you did.
At least I can actually follow a thread of discussion.