Premise: On the island of Borneo, the great natural attractions are Sarawak's caves at Niah and Mulu, river cruises with a visit to tribal longhouses, Sabah's national parks of Mount Kinabalu and the offshore islands, and the Sepilok wildlife sanctuary.

Hypothesis: The great natural attractions on the island of Borneo include many things, but not river cruises with a visit to tribal longhouses.
Relation: contradiction