The concept of vehicle is thought of in two ways in Cyc: as a kind of transportation device and as a relationship between an event and a vehicle used to transport something in that event.

• As a kind of transportation device, it is assumed that it moves under its own power. Examples include jet airplanes and automobiles; non-examples include skateboards, gliders, and rowboats. Note that hand-pushed power lawnmowers, even though they are self-powered devices, are not considered to be vehicles (as a kind of transportation device), since they must be pushed in order to remain in motion.
• As a relationship between transportation events and transportation devices, vehicle is used to mean that the transportation device is both the provider of motive force and the transporter in the event. If an object is a vehicle in this sense and plays the role of transporter in some moving event, then it generally will play the role of vehicle in that event. Examples: a car plays the role of vehicle in driving. Note, however, that a bicycle does not play the role of vehicle in bike riding since it is not a provider of motive force. A borderline non-example is someone sitting in a car while it's being pulled by a tow truck; the car is not playing the role of vehicle in that event (because it is not the provider of motive force - the tow truck is).

A Building is a (usually large) fixed structure with walls and a roof, and with some inside area or areas designed to be occupied by humans (but not necessarily as a residence). Examples include the Empire State Building, Hearst Castle, an aircraft hangar at O'Hare, a light house in the Mediterranean Sea, the Sydney Opera House, and the Washington Monument in Washington, DC.

Weapons are primarily designed as instruments for physically harming or destroying animals (often humans), buildings, or other constructed artifacts. Weapons include swords, portable guns, bombs, and Napalm. Also included are various types of military hardware used to kill, destroy, or immobilize. Note that in the case of weapons which are 'fired' or otherwise distributed, both the launcher and the unit of ammunition are considered weapons in this sense. E.g. a bow, an arrow, a missile launcher, an ICBM, a weapons-grade sprayer, a cloud of mustard gas, a gun, and a bullet are all weapons. Non-artifacts and artifacts designed for some other purpose (as a found rock or brick) may be "used as" weapons, but are not weapons themselves.