:(:who($name), :why($reason)) := (why => $because, who => "me");

What do the symbols $name and $reason refer to?  Are they names already in 

"Alternately, the my declarator can also force treatment of its argument as a 

That would be

my (:who($name), :why($reason)) := (why => $because, who => "me");

which declares $name and $reason, and poises them for aliasing to named return 
values.  Signatures normally are used as the beginning of functions and 
introduce local variables.


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