Emergence is the key to understanding how the quantum world manifests in the macceral world we experience. But what is the state of emergence? Study? Has it coalesced into what could be called a science or math of emergence? Richard graft says, you convinced me that emergence, i'm grouping a bunch of questions together here. Andrea mirabelli: It seems easy to think about how rules about gliders emerge from rules about grid occupation. John stout: Is there a sense in which understanding at the level of phenomena is different than merely being able to reason about how the constituent parts fit together?"