Earlier quoted context omitted.
In the absence of a definition of vehicle I chose to define it as any device that is a conveyance. Thus a wagon, rowboat, and skateboard are all vehicles in the park (even if not in use). However, the tank was not functional. Since it cannot convey it is therefore not a conveyance and therefore not a vehicle. It’s only shaped like a familiar one. I matched the majority only 11% of the time.
I applied the same mental model and also ended with 11%. It's a vehicle if it is transporting people, things, or itself (e.g., the R/C car).
If transporting oneself counts, are all the people in the park vehicles? And all other animals, down to the microorganisms, that are capable of self-transport?
Or I suppose even in the case of transporting other things, people would count as vehicles if they are carrying anything or wearing clothes?