Observation Reorganization -- S27 Observation generalization

We start introducing a new generalization of the former S4 Observation for observing observable situations as S27 Observation, taking over the scope note of S4. We redefine S4 as S4 Single Observation, so that the current properties of S4 stay valid under S4, but as a special one-proposition case of S27 Observation. We connect S27 Observation directly to CRMinf, I1 Argumentation, and no more to E13 Attribute Assignment
 

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