Anchor: In spite of this investment, productivity appears to have increased only in response to hiring freezes, or reductions in the average wage and fringe benefit package caused by special circumstances.
Entailed: Hiring freezes and reductions in wage appear to increase productivity.
Contradiction: Productivity did not increase in response to the hiring freeze.
Contradiction: You cannot request information from the boatman to take you further upstream.
Contradiction: Republicans voted for a resolution stating Clinton should have asked for congressional approval after sending troops to Haiti. 
Contradiction: A dog sleeping in the snow.
Contradiction: A guy walks past a garage.