It's frustrating that we, programmers, write bugs in our code.

One way to figure out how to avoid writing bugs (or, more realistically, write less bugs) is to understand where do bugs come from.

Recently I realized that there are only two sources of software bugs:

• ignorance
• carelessness
  

Probably not the greatest of insights, but I haven't seen it spelled out this way before.

Since it seemed like a topic bigger than a blog post, I've written up a longer article about where do bugs come from and how to avoid them.