“To be or not to be ....” This famous phrase not only introduces Hamlet’s dilemma, it also poses the question a scientific conjecture ultimately must confront. Until that confrontation occurs, the conjecture will be tenable if (1) there is no evidence contradicting it, and (2) it is based either on verified predictions or on a plausible theoretical framework (or both).a Sometimes conjectures graduate and become new paradigms, an example of which is general relativity.
KeywordsDark Matter String Theory Cosmological Constant Early Universe Vacuum Energy
Unable to display preview. Download preview PDF.