SME too rigid in its distinctions
In order for its analogical mapings to work, SME assumes a rigid distinction between objects, attributes, and relations. But it is unclear whether humans make such a rigid distinction.
For example, we sometimes conceptualise wealth as an object that flows between people, but at other times conceptualise wealth as an attribute that changes with each transaction we make.
David Chalmers, Robert French, Douglas Hofstadter, 1995.