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1-This discovery throws new light on diseases of the heart.
2-This discovery throws new light on heart diseases.
In which sentence does the discovery throw light on ALL heart diseases and in which sentence on SOME heart diseases. May-be one can't just tell?
2-This discovery throws new light on heart diseases.
In which sentence does the discovery throw light on ALL heart diseases and in which sentence on SOME heart diseases. May-be one can't just tell?