Anchor: Changes in the estimated system size may indicate that the project was overestimated or underestimated in size and complexity.
Entailed: The estimation of the size of the system suggest the project wasn't sized up accurately.
Contradiction: Changes in size don't mean anything and should be ignored.
Contradiction: The man is chopping carrots.
Contradiction: The lady is outdoors taking photos.
Contradiction: All of the cups were accounted for. 
Contradiction: A wire story about UCLA's overtime win has been found immediately.