text: The third feature can be expressed by stating that deductively valid inferences are truth-preserving: it is 
  impossible for the premises to be true and the conclusion to be false.[71] Because of this feature, it is often 
  asserted that deductive inferences are uninformative since the conclusion cannot arrive at new 
  information not already present in the premises.[72] But this point is not always accepted since it would 
  mean, for example, that most of mathematics is uninformative. A different characterization distinguishes 