Before I resume my review of Robert Nozick’s Anarchy, State, and Utopia, I want to share an observation about the meaning of “science” with my loyal followers. To the point, science is not just about answers or absolute certainty; it’s also about the formulation of hypotheses or “Popperian conjectures” — or in plain English, science is about coming up with good guesses that then can be tested or proven wrong. By way of example, via @alexandrosM, here are 14 hypotheses or possible answers to the following question, Why don’t we have a more potent Delta-targeting vaccine right now? (Hat tip: the Amazing Tyler Cowen.)