Trivia: The prisoners in the prison scenes of the movie were real-life criminals. The directors decided to use 125 real criminals in the prison they were shooting at to add a level of realism. This is in the DVD special features.
Trivia: At the theater where Evan and the others go, the films Seven and Dumb and Dumber are shown both from the maker of this film, New Line Cinema.
Trivia: The psychiatric hospital where Evan goes is the same on seen in Halloween: Resurrection and Final Destination 2.
Trivia: The diaries used by Evan are the very same ones used by Kevin Spacey in "Seven".
Answer: Yes Evan did write that single entry but this time he was at a disadvantage because in this new reality the younger him had already started the blame game of blaming himself and showing symptoms of being in trauma due to which he was institutionalized that same day the incident in the basement happened. Now about that single entry that he wrote before going to meet Kayleigh's dad, it is shown that in this particular reality as he did not maintain a proper journal after that, it got lost and everybody thought he never even started writing it before the basement incident happened leading to everyone believing there is no journal. This explanation is supported by an incident in the movie where the teenage Evan is making a journal at his attic right after his blackout with the blockbuster and Larry being admitted where he finds a box with his grandfather's death certificate and some weird photos in that attic. Later when he is institutionalized and asks for the journals from the doctor the doctor also tells him how his father kept asking for a photo album, suggesting his father also ended up in that institution by jumping realities and ending up in one where his photo got lost and he couldn't reach them anymore (the same photos Evan had found earlier in that attic). So his father got stuck in that institution and he didn't even have a of his birth like Evan did. Unlike his father, Evan got the video of his birth where he was able to stop himself from being born just like his two earlier brothers who reached the same conclusion and were shown in the movie as still births.
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