There has to be a definition of base terms standing for primitive actions, observations and grammatical words (perhaps by a list, to determine what to put on the list would ideally need some experimental research of human cognition). An “abstraction” is then a word not belonging to the base language defined to be identical to some phrase (possibly infinitely long) and used as an abbreviation thereof. By “unpacking” I mean replacing all abstractions by their definitions.
There has to be a definition of base terms standing for primitive actions, observations and grammatical words (perhaps by a list, to determine what to put on the list would ideally need some experimental research of human cognition). An “abstraction” is then a word not belonging to the base language defined to be identical to some phrase (possibly infinitely long) and used as an abbreviation thereof. By “unpacking” I mean replacing all abstractions by their definitions.