Anchor: Leonardo's obsession with swirling water--which found scientific expression in the Codex
Entailed: Codex explains why water swirls.
Contradiction: No one knows why water swirls.
Contradiction: Management must fill up the empty positions with anyone as soon as possible.
Contradiction: A group of people are not standing
Contradiction: There are no people at the park.
Contradiction: People are standing on stairs.