A while ago I was conceiving a story about a guy that actually creates a method for viable time travelling but gets stuck in a paradox after using the machine.
The background story for this is that this guy is a scholar in some tech university that has always been fascinated by the concepts of time travel. He spends some 10 or 20 years trying to find the solution until some older scholar gives him the missing bit of information that sparks his great invention.
To sum things: He builds the machine, travels back in time and realizes that he was the older scholar that gave himself the missing information needed for the machine to exist.
The main idea of a paradox is that it contradicts itself so... he invented the machine because he came back in time and gave it to himself. But he could only do that because he had the idea already, which came from himself... and the loop goes on.
I want to know when/where/how/why it began.
- Did he actually invent the solution himself "somewhen" down the line?
- Is some 4th-dimentional being punishing him for something he hasn't done yet?
- Is the paradox nature's defense system against time travel?
For this answer you can use any paradigm - parallel universes, causality or whatever else you can dig up.
The only constraint is that you CAN'T contradict yourself - i.e.: you have to obey the paradigm's rules.
You CAN mix paradigms but if you do, be sure to state which paradigms you are using and respect both their rules (so if you go to a parallel universe, change stuff, come back and things are different in your home universe, you're doing it wrong).
Feel free to use high sci-fi/fantastic elements (like I did in the second question), as long as you can be coherent in your explanation (yes, you have to explain how the entity's "powers" work) - but I would prefer "science" to be the answer.