Once you beat Honest Hearts can you say anything to Ceasar regarding Joshua Graham?

I believe that it was stated that there were not any dialogue option with him about Graham. I did have the option to tell JG that I had killed ceasar though. It's also the same if you play OWB before DM, that there are no dialogue options for telling Elijia, or Christine about the fact that you had gone there as well.

Just as Darkside Leader stated, sorry no.

Joshua Graham does go into great detail as to why you won't have and new dialouge with Caesar. Can't tell Caesar Graham is alive because that would mean Caesar made a mistake. Can't tell Caesar Graham is dead because that would mean Caesar made a mistake. Caesar doesn't make mistakes.

Likewise, blurting it out like a ten year old talking out of turn would only get you on a cross...maybe in record time.