Anchor: IRA accounts allow income-earners to duck some taxation on that income if they promise to save it until they're old.
Entailed: Accounts with the IRA allow people with an income to dodge some taxation on their income if they save it until they are elderly.
Contradiction: Dodging income is impossible, no matter what. 
Contradiction: I've never been in the Air Force, I'm not sure I know what you're referring to.
Contradiction: A dog is running
Contradiction: I nastily dissent. 
Contradiction: An analyst was tasked to see if a chemical compound was there.