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Full Idea
The 'structural universals' methane and butane are each made up of the same universals, carbon and hydrogen.
Gist of Idea
'Structural universals' methane and butane are made of the same universals, carbon and hydrogen
Source
Alex Oliver (The Metaphysics of Properties [1996], §07)
Book Ref
-: 'Mind' [-], p.13
A Reaction
He cites Lewis 1986, who is criticising Armstrong. If you insist on having universals, they might (in this case) best be described as 'patterns', which would be useful for structuralism in mathematics. They reduce to relations.