Reperire rimam.

He will find some chink, some aperture by which he will escape, was said of crafty, subtle, and cunning men, who, confine them ever so carefully, would still find some method of getting loose; a Monkhausen. But the adage is also applicable to persons who are ingenious in finding a flaw in any engagement or agreement, when it is no longer their interest to abide by the terms of it; to the lower members of the law, who read a deed not so much to find out what was the intention of the parties, as to see whether it may not be made to bear some other construction.
To find out meanings never meant.
Or who, in penning a deed, contrive to insert some word of doubtful, or equivocal sense, that may vitiate some of the covenants, always looking to the advantage of the craft.