Eljer Manufacturing, Incorporated v. Liberty Mutual Insurance Company, and Travelers Indemnity Company of Illinois, Intervening-Defendant-Appellee

POSNER, Circuit Judge.

The appeal and cross-appeals in this diversity suit bring before us a difficult and important question of insurance law, one that we must decide under Illinois law but that has nationwide significance because it involves the interpretation of language that appears in the industry-wide standard-form policy known as Comprehensive General Liability Insurance. George H. Tinker, “Comprehensive General Liability Insur-*807anee — Perspective and Overview,” 25 Federation of Ins. Counsel Q. 217, 218-21 (1975); Abex Corp. v. Maryland Casualty Co., 790 F.2d 119, 121 (D.C.Cir.1986). If…