On Monday, January 10 2011, Ajay Balamurugadas tweeted, "When programmer has fixed a problem, he marks the prob as fixed. Programmer is often wrong. – #Testing computer software book Me: why?W

I intended to challenge Ajay, but I made a mistake, and sent the message out to a general audience:

"Challenge for you: think of at least ten reasons why the programmer might be wrong in marking a problem fixed. I'll play too. #testing"