Anchor: Savings would be achieved if the combined costs of (1) examining the sample and (2) projected losses due to undetected errors on invoices not examined are less than the administrative cost of examining all invoices.
Entailed: Savings could be had if the sample was examined and errors are detected. 
Contradiction: Savings could not be had by looking at sample error rates. 
Contradiction: I spoke to him every chance I could get. 
Contradiction: A sportswoman is in the soccer field.
Contradiction: I'm very confident about owning a home for the second time.
Contradiction: Throngs of teenagers on Saturdays are brought from the suburbs to shop, roller skate, munch fast food, watch films, and just hang out.