Anchor: It's impossible to arrive at any general conclusions about what sorts of instruments are right for Beethoven's keyboard music.
Entailed: It is hard to decide the instruments most suitable for Beethoven's keyboard music.
Contradiction: The best instrument for Beethoven's keyboard music is the piano.
Contradiction: Poop is the best thing
Contradiction: A dog is pouncing on another dog.
Contradiction: Two girls are playing cards.
Contradiction: It took him 3 years to set up the framework for the Pro Bono Commission of Indiana.