Economic value is subjective. "Value" has many meanings. Some of them are objective. Eg: Mathematical values, measurements, etc.
Truth, by definition, must be objective or not be at all. However it requires discovery by imperfect human minds... our knowledge is always incomplete. So any claims of "objective truth" by a human are lies. False confidence is socially rewarded so there is a great incentive to exaggerate certainty. "Your opinions, my facts".