Personally I think that the terms "false negative" and "false positive" are confusing when we talk about CD/DVD media scanning, because there isn't (yet) a general consensus about what it means.

When you test for something, a positive means that you have found it, and a negative means that you haven't found it. A false positive means that the test says it's there even though it isn't, and a false negative means the test says it isn't there even though it is.

That's why a negative is always what you want when being tested for the presence of a disease when you're being examined by a physician.

But when we test CD/DVD media, are we testing to find a problematic disc or testing to find a good disc?

The meaning of negatives/positives and false negatives/positives depends entirely on our testing philosophy (looking for something bad or looking for something good).

Do you see my point?