My biggest television pet-peeve is "enhance that image", where a forensic investigator or similar person is looking at a blurry image on screen and says to the computer tech "can you enhance that?", so they do, and more detail appears. The problem is that it violates the laws of information.
An image cannot gain resolution after it's taken. If you zoom in and find blurring, you can't undo it. If you blur the image deliberately, the information is lost, or at best damaged. Just once I would like to hear the techie say "What? No, of course I can't 'enhance' that part, or any part. If the image is blurry, it's staying blurry."
Mokalus of Borg
PS - You can, to an extent, guess at part of what is lost.
PPS - But you can never regain what has been properly blurred out.