Reference Frame
An agent should be able to recognise meaning information (“difference which makes a difference”) as a difference from "something else".
The “something else” that allows differences to be recognized is a 'reference frame'.
The choice of a reference frame confines the type of difference an agent recognises (such a difference in size, shape, colour, or motion) and a reference value (such as size or shape).
Any discussion of differences assumes one or more reference frames.
Fields, Chris, and Michael Levin. ‘How Do Living Systems Create Meaning?’ Philosophies 5, no. 4 (2020): 36. https://doi.org/10/ghnff9.
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