premise: Musicians perform each of exactly five pieces—Nexus, Onyx, Synchrony, Tailwind, and Virtual—once, and one at a time; the pieces are performed successively (though not necessarily in that order). Each piece is performed with exactly two instruments: Nexus with fiddle and lute, Onyx with harp and mandolin, Synchrony with guitar and harp, Tailwind with fiddle and guitar, and Virtual with lute and mandolin. The following conditions must apply: Each piece shares one instrument with the piece performed immediately before it or after it (or both). Either Nexus or Tailwind is performed second. Each of the following could be the piece performed first EXCEPT:
hypothesis: Onyx