Anchor: A firm with a small share of total volume that competes with an incumbent in delivery only, will find its unit cost high relative to the incumbent, even if the competitor pays no wage premium and or is more efficient.
Entailed: A postage firm that competes with an incumbent's delivery service will find its unit cost high.
Contradiction: Everyone should switch to email to make life easier. 
Contradiction: I have no clue what gold even is!
Contradiction: Some percussion instruments can be seen.
Contradiction: There are people sleeping
Contradiction: The Thompson routine is something that editors like.