Discovery disputes about attorney-client and work product privilege for in-house counsel can be “especially difficult” because company lawyers often provide nonprivileged business advice in addition to protected legal analysis. American National Bank & Trust Co. of Chicago v. Equitable Life Assurance Society, 406 F.3d 867 (7th Cir. 2005).Providing helpful lessons on this important but “not easy to draw” distinction — with an opinion that described some of the defendants’ arguments as …