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## INDEX AND SIGNUM 'Language' is said to be a communication-system, i.e. a system of entities that convey information. It is, however, not the only communication-system. There are innumerable others, natural, as well as artificial, non-conventional, as well as conventional ones. But the prerequisite for something to qualify as a communication system is that it should contain entities, at least two, by which information is conveyed. Those entities are not necessarily all of them formally positive entities. In systems that contain only two entities, one of the entities may formally be the mere absence of the other, e.g. a red dashboard light in a car, the entities in which system are the on-and off-state. There must be at least two entities, otherwise there can be no information. If the red dashboard light could only be on, the fact that it was on would not inform us about anything. If it were always on when the ignition was switched on, and off when the ignition was switched off, it could only inform us about THAT state of affairs. If, however, it can be off as well as on when the ignition is switched on -as is the case -but not on if the ignition is switched off, it can inform us

Publisher

De Gruyter

Published

1972

Language

LA