In 2067, the main character's father tells him over the phone to go for a walk, seemingly knowing that his mother would be murdered, and that he'd meet the other side character as a result. I think his name was jude. Now, it seems as if his father was doing this because he knew the future required it...however, this specific plot thread never manifests. His father never received insider knowledge from the future, and so he had no reason to send his son for a walk, and to meet Jude, or for his mother to die.
It can also be said that he had no reason to DNA lock the time machine, because again, he had not received any reason from the future to do so. He did not yet know that he'd be betrayed and murdered. He figures that out in the next few moments.
So in short, he had no reason to put the bracelet on his son, he had no reason to send him out for his mother to die, etc. The movie seems to articulate that this is some heavy plot element...but never actually justifies or utilizes any of it. It's just sort of there. Almost as if the writers intended on Jude being some sort of pivotal element that would change the future...but he was pretty much irrelevant, because again, the main characters father knew nothing about him.
Is this a plot hole? Was it somehow explained, and i just didn't catch it?