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“….that every judgment must be read as applicable to the particular facts proved, or assumed to be proved, since the generality of the expressions which may be found there are not intended to be expositions of the whole law, but governed and qualified by the particular facts of the case in which such expressions are to be found. The other is that a case is only an authority for what it actually decides….” L.C. Quinn v. Leathem, 1901 AC 495 wherein the House of Lords