Consider a corridor. At one end of the corridor, I stand and can see a torch 50 ft away at the other end. My (completely mundane) vision extends 60 ft. Suddenly, an object affected by Darkness is placed 25 ft away from me, such that there is 5ft between me and the edge of shadowy illumination and 5ft between the opposite edge and of said illumination and the torch. Can I still see the torch?
Quoting the relevant parts of any vision/line of sight rules would be appreciated. I can find rules that say how my vision is affected when looking in the the shadowy illumination, but not beyond it.