Here, let me help. Friday is usually Friday, except when you're using the word to mean any day except Sunday, except when you're using it to mean any day except Saturday. Sometimes it's Saturday, sometimes it's not. Sometimes it's Sunday, sometimes it's not. Either way, it's Friday all week, except sometimes on Saturday and/or Sunday.
Here, let me help. Friday is usually Friday, except when you're using the word to mean any day except Sunday, except when you're using it to mean any day except Saturday. Sometimes it's Saturday, sometimes it's not. Sometimes it's Sunday, sometimes it's not. Either way, it's Friday all week, except sometimes on Saturday and/or Sunday.
Better?
I don't get WordNet 2.
A character from Daniel Defoe's Robinson Crusoe whose name has become a byword for "helper" or "assistant", as in man Friday or girl Friday.