2. Argument #2 Time Travel
We would all like to believe that one day humanity will be capable of time travel.
First: That's not going to happen. Forget it.
Second: It won't happen because humans will have to evolve to much smarter creatures to even begin to understand how we would make a hole in the time space continuum and learn how to repair that same hole before it could literally envelop our world into another place and time.
Third: Did you even finish that last tidbit?
Fourth: If we can't even invent an alternative cheap fuel, how are we going to spend trillions of dollars we don't have on a project that will fail?
Fifth: Have you realized I'm right yet?