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> I agree that static verification of sanity in subtyping inheritance reduces the problem of LSP violations

The LSP itself is never violated in a type-safe language. What's violated is the guarantees that you expected the LSP to buy you. For instance, Java doesn't promise about the meaning of non-final methods. If a programmer assumes such guarantees, the problem is with the programmer, not Java. If he wants such guarantees to hold, he has to use a different language.




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