Scope note: This class comprises physical objects purposely created by human activity. No assumptions are made as to the extent of modification required to justify regarding an object as man-made. For example, an inscribed piece of rock or a preserved butterfly are both regarded as instances of E22 Man-Made Object. Examples: - Mallard (the World's fastest steam engine) - the Portland Vase - the Coliseum In First Order Logic: E22(x) ⊃ E19(x) E22(x) ⊃ E24(x)