Text: And if official productivity statistics understate the real rate of progress by 1 percent, official price statistics also overstate inflation by exactly the same amount.
Entailment: If it turns out that official productivity statistics understate the real rate of progress by 1 percent, then the official price statistics also overstate inflation by exactly the same amount.
Contradiction: And if official productivity statisticts understate the real rate of progress by 1 percent, official price statistics also understate inflation by exactly the same amount.