\\ The bible states that a generation is, "Three score years and ten, but if by reason of strength eighty years."//
We'll ignore the logic of how you got to 1948, for the moment. Adding the three score years and ten to it made a very useful prophecy until 2018 came and went. It now needed another date so "if by reason of strength eighty years" was added, to take us to 2028. What happens then? do you add "owing to the fact that people are now living longer, ninety years" ( "phew, great, that's got us covered until 2038") This really is like a self written insurance policy, all the times you rewrite the details you're covered.