(December 15, 2015, 5:10 PM EST) -- CHICAGO — A professional liability insurer and a finance broker filed briefs in the Seventh Circuit U.S. Court of Appeals disputing whether an insurer is permitted to conduct discovery to determine whether a party is an insured when there is purportedly a “strong reason to believe” otherwise (Landmark American Insurance Co. v. Peter Hilger, No. 15-2566, 7th Cir.)....