A motion under Rule 12(b)(6), like the traditional demurrer, tests the legal sufficiency of the complaint, counterclaim, or crossclaim. In Massachusetts, a demurrer had to stand alone and could not be presented along with other motions or with an answer to the declaration or bill.A motion to strike is filed in connection with a demurrer when it is necessary to strike a portion of a cause of action. A demurrer tests the legal sufficiency of the pleadings, not the truth of the allegations or the accuracy of the described conduct. The court may allow a party to whose pleadings a demurrer has been filed to amend, upon terms, within such time as it orders. In law school, we were taught that demurrers were disfavored and you shouldn't file one unless it would eliminate a cause of action or complaint. DEFENDANT'S DEMURRER AND MOTION TO STRIKE in this action addressed as follows: C.D. Michel. When I get the opposition to my cross motion, may I serve a reply brief and require the moving party to include it in the 9A package? This video describes the grounds and general procedures to file a motion to strike a complaint in a Connecticut civil lawsuit. At least 23 states in the country decide civil justice with juries of less than 12 jurors.