Ah, sorry. Guess I didn't proof read that last post I made carefully. You're going to have to point out how I ignored "everything else you said", though, since all I did was expand on exactly what Orion is and it's mission.
Yes, crew and cargo to ISS is a backup role for Orion. One saddled on it by congress. Now lets look at the reality of it filling that role. To get it there in the near future we have 2 probable launch vehicles, SLS and DeltaIV Heavy. The DeltaIVH, while operational, is not man rated and will take years and millions of dollars to do so. The SLS is in a word, overkill. It can lift 70 tons of payload to orbit of which Orion is a small part of. Now the issue with that is the fact that it costs roughly half a billion per launch and has a projected flight rate of only twice per year. To make things worse, there's no money in NASA's budget to make use of the excess payload capability for a trip to ISS using SLS. They'll have to use ballast. Now, we've got a half billion dollar rocket doing milk runs to ISS to carry mostly ballast.
So yes, Orion can:
A. carry crew
B. carry cargo
C. serve as backup transport to ISS
Will it ever do C? I hope not.
Did I make anymore grammatical errors?