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Not that this invalidates the use of animal models in neurology.

Mr Gentles says that ageing the rum before it is sold is of paramount importance, and that doing so outside of Jamaica invalidates the products authenticity and uniqueness.

Legal experts also told us that there is nothing in US law which would invalidate pardons signed by autopen.

“Under what authority, or according to what philosophy, can a government invalidate or discredit research that’s focusing on two-thirds of the population?”

Current conservative justices take an expansive view of executive power and may be anxious to invalidate congressional restrictions on the White House.