Before revision:  Furthermore we explain how to extend an \mathcal{M on a set \Omega to a pathwise duality without changing the superhedging price.
After revision:  In bringing the two streams of literature together, we also examine and relate their many different notions of arbitrage. We also clarify the relation between robust and classical \mathbb{P on a set \Omega to a pathwise duality without changing the superhedging price.