"If time travel is possible", therefore... what?
Following Nick Bostrom's "simulation argument" formulation ( Simulation hypothesis ), the "time traveling argument" could be expressed like that:
If in the universe time traveling is possible, then modifying the past is also possible, then creating new branches of time is also possible, then at least 1 of the following propositions have to be true:
- the fraction of living species in the universe that reach the point where they can achieve time traveling is close to zero,
- the fraction of the living species in the universe that are interested in time traveling is close to zero,
- the fraction of the branches of time that have been created by time travel is close to one.
So if 3) is true,
- therefore we are very likely living in a branch of time that was created by time travel,
- therefore it's very likely that our past has been already modified by time travel