Anchor:  Scuba-diving schools operate on Ibiza and Formentera, though the locations tend to change from year to year.
Entailed: The locations of the schools varies from one year to the next.
Contradiction: The schools are always located in the same spots.
Contradiction: A man sleeping on his bunk bed.
Contradiction: Tuppence asked haughtily for them to let us pass.
Contradiction: We had coke and forgot to wash up.
Contradiction: There are a number of additional categories not currently amenable to qualification or valuation, in addition to the quantified and monetized benefits summarized above.