» objects
→“things” of the real world, such as organisms, creatures, events, processes, natural phenomena, etc. or
→conceived objects
» concepts
→mental abstractions corresponding to objects
» representations
verbal and non-verbal conventional symbols such as
→terms or other kinds of designations for denoting concepts
→definitions or other kinds of explanations for describing concepts
→non-verbal representations, such as graphical symbols, pictures, diagrams, sounds, motions, etc.
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