I see where you're coming from in your response claiming that both Jack and Rose would not have physically been able to fit on the door together. However, there are also sources that have tested and found that both of them, would in fact of been able to partly hang on, increasing their chances of survival. In a Variety article titled, "James Cameron Admits There’s One Way ‘Jack Might’ve Lived’ After Scientifically Testing ‘Titanic’ Door Raft: ‘There’s a Lot of Variables’" it is stated that in a test, "Cameron again fit both Jack and Rose on the raft but positioned their bodies so that their upper halves (which includes vital organs) remained out of the water." I was just wondering what sources you're referencing in your claim to come to this conclusion?