An information paradox is a paradox about information. Such paradoxes include:
- Arrow's information paradox — the difficulty of selling information when describing the nature of the information to the buyer would, in itself, communicate the essential information.
- Black hole information paradox — information may be lost when a black hole evaporates but this would violate the principles of quantum mechanics.
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“A good aphorism is too hard for the teeth of time and is not eaten up by all the centuries, even though it serves as food for every age: hence it is the greatest paradox in literature, the imperishable in the midst of change, the nourishment which—like salt—is always prized, but which never loses its savor as salt does.”
—Friedrich Nietzsche (1844–1900)