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There are 4 tiers of activity within the community which can be visualised as a pyramid or hierarchy of reasoning;

  1. Theory
    Purely theoretical work, without specific aims aside discovery.
  2. R&D;
    Applied theory (creating, discovering, producing).
  3. Outsourcing, income, experience, teaching
    Developing counselling, maintaining, educating.
  4. Chores, work, cleaning cooking, washing, farming, preparing. 
While changes in experience, ability and aptitude may make you remain more often in one of the top 3 tiers everyone irrelevant of position within the community or competence has equal time in the 4th tier.