The following items all have something in common.
- A Scandinavian country.
- A manual consisting of aphorisms.
- A famous former English professional footballer.
- Beef or mutton fat.
- A genus of evergreen trees.
- A former chemical symbol.
Moreover, with the addition of one more item they would form a complete set, which I call a pointer set.
Can you determine what the items above have in common?
Can you give an example of an item which would complete the set?