This must be a classical boob. I shot a roll of Tri X with a model in the studio, cranked it back, and wrote EI 200 on the leader because I was certain I had shot it at 200, since I do this very often. Then, it dawned on me that I may have shot it at nominal speed, 400. And indeed, my camera shows 400 on the ISO dial, and I didn't use it since. But actually, I'm not sure of anything anymore. How would you process that film? This is to scan the neg later. Thank you.