Nine Grounds for Reversal? Or None?

I just happened on this quotation from the Sixth Circuit Court of Appeals.  “When a party comes to us with nine grounds for reversing the district court, that usually means there are none.”  Fifth Third Mortg. Co. v. Chicago Title Ins. Co., 692 F.3d 507, 509 (6th Cir. 2012).  Panelists at appellate practice seminars often emphasize the importance of selecting just a few good arguments for an appeal and jettisoning any others.  This nugget from the Sixth Circuit reaffirms that advice officially.