Retrospection = false for entities means that the current state only, of the existence of the entities, is recorded. An example from the Wine Club would be the supplier dimension. There may be a need to be able to distinguish between current suppliers and previous suppliers. There is no requirement to record the intervals of time when a supplier was actually supplying wine to the Wine Club as distinct from the intervals of time when they were not.
Retrospection = false for entities means that the current state only, of the existence of the entities, is recorded. An example from the Wine Club would be the supplier dimension. There may be a need to be able to distinguish between current suppliers and previous suppliers. There is no requirement to record the intervals of time when a supplier was actually supplying wine to the Wine Club as distinct from the intervals of time when they were not.