Anchor: This is because there is tremendous variation in the quality of the materials used and the skills of the workmen involved.
Entailed: There is a large variation of skill and quality materials used. 
Contradiction: The same skill and materials are uses in all. 
Contradiction: We have no vulnerabilities that can be seen.
Contradiction: Animals are outside.
Contradiction: The SEC does not need to release reasoning behind proposed agency actions.
Contradiction: There is at least one child dancing among a group of people gathered outside.