gistfile1.txt

sun_choloro    = should_have.node('sun').link('light').node('choloroplast')
sun_plant      = should_have.node('sun').link('light').node('plant').link('light').node('chloroplast')
chemical_sun   = should_not_have.node('sun').link('chemical').feedback('the sun doesn't emit chemicals')

requirements << AndRule
    'your diagram has problems'
    chemical_sun
    OrRule
        'how does the plant get energy'
        Rule.node('sun').link('light').node('choloroplast').feedback('how does the plant get energy'),
        Rule.node('sun').link('light').node('plant').link('light').node('chloroplast')
 


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