teaching about the effect of something has a uncertain roots on preventing that something
practice is not learning_by_doing. reading_books has not effect_of_gaining_knowledge writing has not effect_of_learning uncertainty_principle is scientific_theory. writing has effect_of_learning reading_newspaper has not effect_of_learning_about_events uncertainty_principle is not scientific_theory. graphology is discipline. reading_books has effect_of_gaining_knowledge reading_newspaper has effect_of_learning_about_events