Hi all, some 3 a.m thoughts I had recently(spank me if this is a dumb question): Exactly as the topic, what do we mean by one? Have we measured one? One of a (book), one of a (pencil), one of a (human) all mean something with regard to counting but fundamentally, what is one? We went from atoms to electrons and protons and then, quarks and leptons but will we ever measure one? Does it mean anything to mathematics that one remains unmeasured? Measuring one seems likely but can we measure zero?(nothingness, (in)existence <--don't think this one is a word) Is zero(0) merely just an idea such as infinity? Am I just crazy?