[mysterydip]

It reads like that at first. What it's saying is for example: Assume x is 5. Assume function TimesFive multiplies things by 5.

When we do TimesFive(x) and my answer is 50 instead of the 25. I check the TimesFive function and it's just "print x*5". But how is that possible? 5x5 is 25!

The problem in this case is my assumption that x would be 5 was wrong.

I've had this issue before in my code (though not as trivial an example of course), but it's always a good reminder of something to check when troublshooting.