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What is "Entailment"?



John M. wrote:
'entailment' is still my old foe: I figure 'entail' is as forming the 'tail' of something, as in e.g. a consequence, originational result, a needed initiator to the entailed. Then again in my totally deterministic world (as far as the origination of things goes, not the outcome (as in: future - and that is a special topic) negates anything NOT to be entailed by origination.
So your question startled me:
Where do the entailments come from, in your respective views of evolution as a process of change?
as: entailing the change, or entailing further changes? or even: who (what?) orchestrates the origination of the process?
 
Entailment, as Robert Rosen used the term, doesn't just refer to consequences or results (as in the sentence; "This tornado was caused/entailed by...") but to all the potential consequences as well.  All causality (everything that happens) is entailed, in RR's view, but each system has a whole collection of entailments which give it all the potential of what COULD happen.  Entailment refers to the systemic "rules"-- as specified by the organization. We could make a blanket statement and say, logically, that the organization of the universe provides the set of entailments for all that is possible in the universe. But individual system organization takes that potential entailment and further sculpts it into a systemic entailment pattern (which is expressed via causality and that's what we observe). We derive all of our capability, as a species, from our entailments.
 
The impact of relations on causality are the reason why this is true. No interaction can be described unless the relation by which the interaction takes place is also described. The nature of that relation is what specifies the entailments and that, in turn, determines the outcome (causality). For example, if you're standing in a big puddle of gasoline and you light a match, dropping it into the puddle; there are a set of entailments which are likely to cause extreme bodily injury or death to you. However, if you are not standing IN the puddle of gasoline, but are some distance away when you throw a lit match into it, you will experience a different outcome. Both outcomes are always entailed, but different relations will govern the interaction differently. Thus, the entailments of what we observe happening in the universe (causality) are only a small subset of the total entailments any system possesses.
 
Relational interaction is what it's all about. Each interaction is entailed and also entails-- it goes both ways. So, sodium and chlorine have the entailment to form a molecular bond which, if it happens, creates a compound; sodium chloride (salt). Salt has entirely different properties from either sodium or chlorine, and that's because it has different entailments. It's a different system, with different organization than either of the elements from which it is created. The entailments of salt are specified by that organization, and can only be understood via that set of relations.
 
Does this help make it more comprehensible?
 
Judith