Anchor: Two musicians are performing.
Entailed: Two musicians perform
Contradiction: Two musicians create new instruments
Contradiction: The technique has been in use on the peninsular since the 18th century.
Contradiction: The Pyramid of Kephren seems smaller than the Great Pyramid due to being on higher ground.
Contradiction: HIV cannot be traced from chimps to humans. 
Contradiction: You couldn't dream of what is beneath.