I had a woman walk into my store with a destroyed picture. Here's how the conversation went:
Her : "The dog got hold of this picture, can you fix it?"
She shows me a destroyed picture of her standing next to her husband in front of some woods. Her husband's entire head and most of his body is missing.
Me : "Well, I can crop it so it's just you, or fill the missing part with more trees etc, but that's about it."
Her : "WHAT??? You can't put my husband back???"
Me : "... ... ... Ma'am, I can only work with what I'm given."
Her : "Well this is just ridiculous! Why do you say you can resotre photos if you can't do a simple thing like put my husband back in the picture???"
Me : "Ma'am, I can only work with what's already in the picture. I can't magically recreate an image of your husband from nothing."
Her : "Yes you can, I've seen them do it on TV!"
Me : "No, ma'am, you haven't, unless you're talking about a sci-fi show. I have no idea what your husband even looks like. If you can explain to me how it would even be remotely possible for me to put him back in, I'll be happy to do it for you."
Her: "Are you calling me a liar?!?!"
Me : "Ma'am, all I'm saying is it's impossible to put your husband back in this photo. I use photoshop...and photoshop doesn't have a magic 'create pixels from nothing' feature."
Her : "I've never been so insulted in my life!!!!! I'll go and get a REAL PROFESSIONAL to do it for me."
Me : "Good luck, I suggest waiting for the Enterprise to come into orbit...their computer might be able to help you."