Anchor: When the cross elasticities are zero, substantial welfare gains are available from discounts larger than 6a and the optimal discount appears to be well above 8a.
Entailed: Cross elasticizes can be zero.
Contradiction: Cross elasticies are always in the hundreds.
Contradiction: Those entering and departed did so without guards.
Contradiction: A little boy balancing on rocks
Contradiction: The rain tripled our yield of squash and potatoes.
Contradiction: An object is flying in the sky.