Anchor: However, if more than one system is installed at a site, some significant efficiencies result.
Entailed: Powerful inefficiencies occur when more than one system is installed.
Contradiction: Installing more than one system per site does not cause efficiencies to improve. 
Contradiction: The sky was painted dark green by the setting sun and blood moon.
Contradiction: Nazareth is populated by both Christians and Muslims.
Contradiction: Women on the ground looking up at there fellow workmen standing on a scaffold.
Contradiction: A person fell.