“ Idempotence is the property of certain operations in mathematics and computer science whereby they can be applied multiple times without changing the re

“ Idempotence is the property of certain operations in mathematics and computer science whereby they can be applied multiple times without changing the result beyond the initial application. It does not matter if the operation is called only once, or 10s of times over. The result SHOULD be the same.” Does not the use of “SHOULD” instead of “MUST” make this dead on arrival? Edit: I see a number of others have the same thoughts.