> We do not know that his heart failed during the journey. (It might.) Sure. We also do not know his heart didn't fail, though you seem sure it didn't. However

> We do not know that his heart failed during the journey. (It might.) Sure. We also do not know his heart didn't fail, though you seem sure it didn't. However, the clues throughout the movie make it fairly obvious that he doesn't make it. > We know that, reasonably, management would want the margin of error on the right side for a high investment journey. Sure. And we also know that he has heart problems and is living on borrowed time. We also know that running on the treadmill nearly leaves him breathless and clutching at his chest in terrible coughing fits. There must be a reason why that scene was in the movie. Don't you think? The ending certainly leaves it open to interpretation. That's what's great about the movie. It didn't spoonfeed the audience. But it did provide hints/clues/etc. Put it this way, there are tons of clues that he dies. There are no clues that he lives. If he lived, the movie would have some mentioned what he planned to do once on titan. Or any clue that he intended to survive the trip. Like maybe, Vincent telling Jerome, "Hey, I need a few samples to live on Titan" or "Hey, I got a nice apartment on Titan" or "Man, my new job on Titan is great" or anything indicating a life on Titan. Ever notice he never mentions his life on Titan? The only thing he is concerned about is getting on that spaceship. If you were watching a kamikaze movie and at the end, the pilot flies off with enough fuel to reach the aircraft carrier group but not enough to make it back. Would you argue that he makes it back alive since we never actually see him carry out the attack? Sure, anything is possible, but highly unlikely. Is it possible Vincent made it to titan? Sure, if they want to do a sequel perhaps. Is it likely? I don't think so. But it's art. Your interpretation is just as valid is mine.