Duplicate objects - page 1 Some ZOZ objects are absolutely unique. For example: switch # 384930 => desk lamp # 9383033 Here I mean THAT switch and THAT switch only (imagine me pointing to a specific switch on the wall to my left) and I mean THAT desk lamp and none other (pointing to the lamp on my desk). An identical lamp 6 inches away will not do. All physical sensors and motors are unique. A sensor senses the physical universe at a particular location. A sensor 0.001 millimeters away is sensing a different location. A motor moves something at a physical location. Two motors or sensors cannot be in the same place at the same time. But arithmetic objects are different. They are (usually) not unique, but instead can have any number of physical duplicates. For example: X , Y => multiplier Here, there may exist many physical multipliers, all exact copies of an "original" one whose serial number is specified in the instruction. If so, the ZOZ may route X and Y to any one of them.