Anchor: Conversely, federal surpluses add to national saving.
Entailed: Federal savings benefit from surpluses. 
Contradiction: A federal surplus means higher taxes. 
Contradiction: The bus wheel is made of stone.
Contradiction: A time lapse of people crossing a street.
Contradiction: This definition of retirement income is identical to the one discussed in Q1.
Contradiction: A dog is biting another dog.