User blog comment:Mr Bio Shock/Attempting to Understand Infinite's Ending... (Spoilers, of course)/@comment-98.149.162.92-20130404223846/@comment-3048593-20130405164130

At the very very end, it can go both ways. Either he enters the room finding her lying in her crib, or he finds her gone having never existed in the first place, or him being drowned didn't change anything.