Anchor: However, cost models have significant limitations in accuracy unless their underlying assumptions of system size and cost drivers are carefully chosen and reflect the agency's previous experience in system development.
Entailed: Cost models have major limitations in accuracy.
Contradiction: Cost drivers aren't an important factor, so no thought goes into choosing them.
Contradiction: The two dogs are sleeping on the porch.
Contradiction: A snowboarder does some jumps.
Contradiction: Saying Bonjour is only required while in big cities.
Contradiction: Civilization seemed to have ended before the world did.