I was responding to where you said Batman didn’t know that kryptonite would have success against Doomsday. All we can go by is what was in the movie, right? It doesn’t seem like it was simply assumption as Batman had just had success with kryptonite against Superman. Now if you would’ve said Batman assumed kryptonite would have success against Superman, I would agree because up until that point, there was nothing that definitely suggests that kryptonite would’ve even work against him, but he definitely knew it would have some success against Doomsday, which is why he engaged him in order to lead him back to the Gotham port.