Processing feedback in dynamic systems
 
 In a dynamic systm or simulation, variables inform the procession of model states as the variables themselves develop.
 
 If the volume of an expanding object has an inverse correlation with its growth rate, the growth rate slows as the object grows.
 
 variables inform other variables. In a circulatory system made of pipes or blood vessels, matter flows continuously. It is a semi-closed loop with limited inputs and outputs. If there is buildup in the circuit, the function of the greater system of which it is part of will be altered.
 
 Macro-organs like blood vessels seem simple compared to their micro-counterparts. On small scales, chemical reactions destroy, alter and create themselves constantly. The behavior of macro organs is the effect of this unseen behavior.
 
 A fluid transportation system might have two aspects: the purpose of the system and its health. Its health is its ability to operate in the way that is understood to be correct. In a way, in biology, it is not really possible to determine the purpose of a strategy outside of the context of the maintenance of the things which are doing things.
 
 There is a disctinction between an object and what is around it and not the object. Entity-hood is a discernible quality of systems and things. Examples are:
 - a cell and a cell wall
 - a walled city and the land around it
 
 Prescribing intention and purpose to things is difficult.
 
 Two thoughts:
 1. Intuitive understanding of dependence and independence
 2. Assignment of traits such like desire, purpose and intent to items and circumstances aka things.
 
 Aqueduct problem: aqueous flora, mineral deposits and silt build up and constrict the vessel at some points. I am a Roman noble and lately my bath has been taking twice as long to fill. I need to use more wood to heat the water because it has more time to cool before my water basin is full. Therefore the servant who heats my bath has less time to peel shrimp. I have to assign another servant to peeling shrimp and now she has less time to talk to her friends at the spring, so she is more upset, and that is unpleasant to me. This demonstrates an evology.
 
 Idefining the behavior of a simulated dynamical system requires partitioning information commensurate with what the system should clarify. Programs analyzing force or diffusion in materials may consider some of the behavior of particles on a very minute scale, but there is always a limit, and the magnitude of data in silica does not begin to approach the real world, especially in organic scenarios. To be effective, a model must predict the summation of behavior at a smaller scale. If the behavior of groups of actors is predictable, a model can be made. Somebody might call this "emergent behavior" because it concerns a result borne from an aggregate of actors.
 
  Tissue growth relies on principles which yield observable results. I am modeling a system which reproduces a speculative observable result, usually without attempting to reproduce the actual chemical dynamics of my target phenomena. Cells multiply and are arranged so that they form tissue. The substance of tissue is a product of a metabolism, which is a system not unlike an aqueduct. Components are broken down into more basic chemical composition for use in the body along the way.