I need a time estimate for your edits.

I told you before, I'm modifying someone else's code. I have no idea how long that's going to take.

How about narrowing it down?

That's asking a lot. It might take me 10 hours just to figure out that it takes me 10 hours and 5 minutes to complete the task.

Before you continue, know that I can tell from a glance that you only have to change 3 lines of code.

So about that estimate...

4 minutes?

Let's make it 2.