If {TAIL ~ a value} has been assigned to a particular alternate dispatch variable, then {HEAD ~ the message} sent to the initial object is transmitted to the object referenced by the alternate dispatch variable for which a value has been determined 
If { TAIL ~ a value } has been assigned to a particular alternate dispatch variable , then { HEAD ~ the message } sent to the initial object is transmitted to the object referenced by the alternate dispatch variable for which a value has been determined
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH