⇑Immunomicrotope – Microenvironment-Related, Metabolic and Microbial Signals for the Regulation of Immune Cell-Pathogen Interaction at University of Regensburg
Interaction is a kind of action that occur as two or more objects have an effect upon one another. The idea of a two-way effect is essential in the concept of interaction, as opposed to a one-way causal effect. A closely related term is interconnectivity, which deals with the interactions of interactions within systems: combinations of many simple interactions can lead to surprising emergent phenomena. Interaction has different tailored meanings in various sciences. Changes can also involve interaction.
I would take to be quite a fool any man who would make a book full of laws and statutes for an apple tree telling it how to bear apples and not thorns, when the tree is able by its own nature to do this better than the man with all his books can describe and demand.
Martin Luther, Temporal Authority: To What Extent It Should Be Obeyed (1523), in Luther's Works, vol. 45 (1962), p. 89
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