We sell PowerPoint templates. Someone called saying "My client wants a presentation that runs continuously and displays name, but they want to be able to update the names through a text file instead of actually editing the presentation in PowerPoint. Do you have any templates that can do this?"
I said, thinking this is probably not possible in PowerPoint, "We definitely don't have templates with that kind of feature, and I've never heard of anyone being able to do that. But if YOU figured out how to make it work, then you could make it work with any presentation template."
Man, snidely: "Aren't YOU supposed to be the experts? You have to tell me how I can do it."
Me: "We're experts with our templates, but you're looking at PowerPoint functionality. Our customers are expected to know how to use PowerPoint."
Man: "I disagree."
Me: "OK, you can disagree if you'd like."
Man: "So what you're saying is that you can't help me."