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Full Idea
Two substances having different attributes have nothing in common with one another.
Gist of Idea
Two substances can't be the same if they have different attributes
Source
Baruch de Spinoza (The Ethics [1675], I Pr 02)
Book Ref
Spinoza,Benedict de: 'Ethics', ed/tr. White,WH/Stirling,AH [Wordsworth 2001], p.4
A Reaction
This is the contrapositive of Leibniz's Law (i.e of the Indiscernibility of Identicals). Same things must have same attributes, so if the attributes differ they can't be the same things.