Anchor: least cost) approach to operating the electric power system over a given time period subjectto specific constraints (e.g.
Entailed: The least cost approach to operating the electric power system subjects to specific constraints.
Contradiction: The most expensive approach to operating the electric power system subjects to specific constraints. 
Contradiction: girl eats cheerios
Contradiction: A man plays drums while making a face with his gray sweatshirt on.
Contradiction: People separate noticeably whilst eating.
Contradiction: Two people in a field.