Anchor: Rather it may serve to delay the conception of a rival for maternal resources--both directly (by literally coming between Mom and Dad) and indirectly (by tending to prolong breast-feeding and, therefore, to suppress ovulation for a longer period).
Entailed: It may serve to delay, directly or indirectly the conception of a rival for maternal resources.
Contradiction: It is useless to delay, directly or indirectly the conception of a rival for maternal resources.
Contradiction: cat looks at birds
Contradiction: There is an animal in the field.
Contradiction: A sailboat is sitting at the dock being prepared for a trip out in the ocean.
Contradiction: Nonexchange revenue includes revenue transferred from the General Fund.