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A Causal Link Has a Polarity That Says Same Direction or Opposite Direction

The notation atom the rest of lop- is built from; lop-counting-negative-links, lop-drawing-cld-from-a-story and every loop-type claim rest on it directly. Rests on stk- for the habit of naming quantities with units, and on lop-circular-causality-vs-straight-line for the reason to bother. Deliberately stops short of link strength, equations, gains and any numeric relationship, all of which belong to the differential-equation and simulation fence in section 4.

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Building Causal Loop Diagrams in Vensim

A causal loop diagram (CLD) represents a system's structure as variables connected by arrows denoting causality (not mere correlation), where each link carries a polarity — positive if the cause and …