Anchor: DOD has historically developed new weapon systems in a highly concurrent environment that usually forces acquisition programs to manage technology, design, and manufacturing risk at the same time.
Entailed: The DOD uses a highly concurrent environment when developing new weapon systems.
Contradiction: Highly concurrent development environments manage technology and design separately.
Contradiction: Tommy wasted no time and went ahead.
Contradiction: Anecdotes of this kind are often convincing.
Contradiction: I know all about that. 
Contradiction: Commuter on a bus.