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The state of the law ... and the law of the state
happens all the time
This is standard contract doctrine. Suppose you draft an agreement which states that "all work will be performed using agile development methodologies." Later on, it turns out that there are problems which somehow are traceable to the developers NOT using the methodologies which have come to be known as "agile." So you say you meant "flexible" and the customer says he understood you to mean the particular formalized process -- you lose on the point; the Court will construe the contract as understood by the non-drafting party.
Sorry for the lousy example but I hope it suffices to make the point.