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Vacuously True

Definition: Informally, a logical statement is vacuously true if it is true but doesn't say anything; examples are statements of the form "everything with property A also has property B", where there is nothing with property A.
Source: http://www.wordiq.com/definition/Vacuous_truth

Example: Another example of a vacuously true statement is the fact that the empty set is a subset of any set.
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