Right I meant that I don't think we want to allow:

```
SphericalRepresentation(Latitude(...),Longitude(...))
```

in addition to:

```
SphericalRepresentation(Longitude(...), Latitude(...))
```

so that there should be only one 'order'. So I'm specifically disagreeing with the ``order doesn't matter`` statement. These can be keyword arguments which if specified can be passed in any order, but if passed without keyword arguments then the order should match (i..e no magic with swapping lon and lat). Does this make sense?