Anchor: Slate doesn't get used up by being used.
Entailed: If you use Slate, it is still useable.
Contradiction: Slate has diminished.
Contradiction: There is no advice available in any document on how to benefit from advancements in this field.
Contradiction: We have been talking back and forth for a while Dana.
Contradiction: A man takes scuba lesson at the far end of the cove.
Contradiction: There are kids dancing and doing a pyramid.