premise: Three Occasions for Orchestra is an orchestral triptych by the American composer Elliott Carter. The work was composed from 1986 through 1989 and was first performed at the Royal Festival Hall, London, by the BBC Symphony Orchestra under Oliver Knussen on October 5, 1989.
hypothesis: Oliver Knussen did not conduct the Orchestra in 1986.
reason: The computer thinks it is incorrect, but my statement is correct because Knussen first led the orchestra in 1989. In 1986, it was still being composed by Carter. 