operator: inherit

    description:
        inherit[op] ket
        inherit operator from parent data-types

    examples:
        -- learn a little about our old cat Trudy:
        -- and the inheritance structure:
        inherit |trudy> => |cat>
        inherit |cat> => |feline>
        inherit |feline> => |mammal>
        inherit |mammal> => |animal>
        has-fur |animal> => |yes>
        has-teeth |animal> => |yes>
        has-pointy-ears |feline> => |yes>
      
        -- Trudy has no teeth, which over-rides the animal has-teeth rule:
        has-teeth |trudy> => |no>
      
        -- now ask some questions:
        inherit[has-pointy-ears] |trudy>
            |yes>

        inherit[has-fur] |trudy>
            |yes>

        inherit[has-teeth] |trudy>
            |no>
    
    see also:
        clone