I would rather be right than rigorous.
The past, like the future, is indefinite and exists only as a spectrum of possibilities.
The Universe in a Nutshell
When something is made idiot proof, they will just make better idiots.
[In the Universe it may be that] Primitive life is very common and intelligent life is fairly rare. Some would say it has yet to occur on Earth.
If we ever do find a complete theory of the universe, it would be a great triumph of human reason but it wouldn't leave much for us to do. We need an intellectual challenge.