Johnson v. City of Shelby Skinner v. Switzer Matrixx Initiatives v. Siracusano Ashcroft v. Iqbal Erickson v. Pardus Bell Atlantic v. Twombly Dura Pharmaceuticals v. Brouda Swierkiewicz v. Sorema Leatherman v. Tarrant County Papasan v. Allain Associated General Contracters v. Carpenters Conley v. Gibson