Anchor: Each caste would preserve its  purity  by avoiding intermarriage and not sharing food with other castes.
Entailed: Castes chose not to share their food with other castes.
Contradiction: Castes eagerly cooperated with each other, even permitting intermarriage.
Contradiction: The animals are laying on a bed.
Contradiction: A man is receiving a gift.
Contradiction: The men are sleeping in their tent.
Contradiction: These dishes of food fill up the counter