Absolutely! It is not correct to say that computation does not necessarily involve information. It is nothing but information processing. And indeed informatics is more general than computation since it also includes the theories of: information retrieval/storage; data mining, communication theory; coding theory, cryptography. The appropriate picture is that information is a universal concept and informatics is the study of its various aspects in both nature and society. In this context, "computer science" covers only a part of informatics. To draw an analogy, the relation between informatics and computer science is analogous to that between physics and mechanics.
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