Anchor: Modular construction can minimize field labor and construction time on a site by prefabricating at a shop and then transporting large sections, such as ductwork or absorber modules, by barge or truck.
Entailed: On site construction time can be minimized by using modular construction.
Contradiction: Modular buildings take longer to set up than other buildings.
Contradiction: Someone is sleeping in the winter.
Contradiction: There are things you have to consider when trying to decide how strong or weak corroborating evidence is. 
Contradiction: The man is swinging a hammer.
Contradiction: There are two people chatting.