[A]cts of parliament that are impossible to be performed are of no validity: and if there arise out of them collaterally any absurd consequences, manifestly contradictory to common reason, they are, with regard to those collateral consequences, void. … [W]here some collateral matter arises out of the general words, and happens to be unreasonable; there the judges are in decency to conclude that this consequence was not foreseen by the parliament, and therefore they are at liberty to expound the statute by equity, and only quoad hoc disregard it.