The names of the tuple field are a part of the method signature. Would you expect to be able to change other parts of the method signature, like the method name or argument types, and not have stuff break?
[edit] unless you're talking about how your example magically introduces "interjection" into the scope. That's not how it works. You would have to say "greeting.interjection". Or use the destruction syntax and say "var (ichosethis, andthis) = generateGreeting();", in which case its the order of the fields, not the name of them, that is important.
[edit] unless you're talking about how your example magically introduces "interjection" into the scope. That's not how it works. You would have to say "greeting.interjection". Or use the destruction syntax and say "var (ichosethis, andthis) = generateGreeting();", in which case its the order of the fields, not the name of them, that is important.