Study Cards on identity, identical, books
What is the major difference?
The major difference being IDENTITY.
We say that objects/class instances have their own inherent identity.
If we had the two identical books and compared them, we would still say that they are different books
Two copyright years with the same value are the same, because their values are the same.
If we compare two identical copyright years, we would say they are the same year.
Two items with the same cost have identical costs, but the changing one of the costs does not change the other cost.
Their identity was contingent (toevallig) and not inherent.
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