The last bug

Coworker: Hey, John. How’s that code going?

Me: Well, it’s looking pretty good. I just fixed the last bug we know about … And you know what that means, right?

Coworker: It’s done?

Me: Well, no … Not quite.

Coworker: What’s it mean, then?

Me: It means there’s a lot we don’t know.

So, what’s the difference…engine?

Today, I found this quote by Charles Babbage on Wikipedia:

On two occasions I have been asked … “Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?” … I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question.

Now, there’s something any programmer can sympathize with!