|  |  |  |  |  |  |  | 
   
    | • | A
    signal traveling through an instantaneous path 
 | 
   
    |  | is
    immediately delivered to the destination 
 |  | 
   
    |  | 
   
    | • | An
    oracle is supplied to delaying paths to 
 |  | 
   
    |  | determine
    whether the path forwards the signal 
 |  | 
   
    |  | 
   
    | • | If
    there is an inconsistency in the address of the 
 |  | 
   
    |  | signal,
    a warning is generated, and the signal is 
 |  | 
   
    |  | discarded 
 |  |