So in the case of energy being created or destroyed, I don't think scientists ever claim that it is "impossible." The merely say that it cannot be created or destroyed in an isolated system (as far as they know). The parenthetical "as far as we know" is assumed to follow all statements of scientific law, so it is never said in order to avoid redundancy.
Dark energy, for instance, may be a case of the universe breaking the first law of thermodynamics. Or it may just be an innate instability in spacetime. Scientists are still puzzling it out.
Dark energy, for instance, may be a case of the universe breaking the first law of thermodynamics. Or it may just be an innate instability in spacetime. Scientists are still puzzling it out.
