premise: Northern Kings was a Finnish symphonic metal cover supergroup, made up of four well known musicians: Jarkko Ahola from Teräsbetoni, ex-Dreamtale, Marco Hietala from Nightwish and Tarot, Tony Kakko from Sonata Arctica and Juha-Pekka Leppäluoto from Charon and Harmaja.
hypothesis: Marco Hietala is not from Nightwish and Sonata Arctica.
reason: Actually, Marco Hietala is from Nightwish and Tarot, not Sonata Arctica. The model was fooled because the statement was half righ.