I think there's a difference between the normal puzzles typically "Can you identify this car I've found?" and the few "I don't know what this is, can anybody identify it?" questions which appear among the mainstream puzzles. Is it worth creating a separate "Help identify this unknown car" thread rather than treating them as normal puzzles. It will avoid the "Is it a blankety blank? - I don't know" dialogues where puzzlers forget it's an unknown. I appreciate that to get it off the ground an admin will have to dredge through the Black Hole, Pros and Feature Writers, Pros etc and move the relevant puzzles across. As it's no longer a puzzle as such, the original poster would be free to give any information he does know and avoid unnecessary lead-in questions.
What do people think?