Anchor: The sensitivity of cost to volume for a postal system can be investigated directly provided the ratio of fixed to variable costs is known by function.
Entailed: Postal system costs are linked to volume.
Contradiction: Postal system costs are not linked to volume.
Contradiction: You're an Atheist, so why should it matter?
Contradiction: Dave considered it.
Contradiction: a girl is getting tickled
Contradiction: A man looks at something