Normal law, unreliable airspeed caused by blocked pitots (the ASI behaves like a VSI) - just after take off, as the aircraft climbs away, the airspeed unreliably indicates a rapid increase which in turn causes the overspeed protection - a PROTECTION thus implying the aircraft is in normal law. Once in the protection you ain't getting out without crashing or forcing it into alternate law. The aircraft, being in normal law and trying to protect from the overspeed will keep raising the nose, into the stall, and then roll on it's back. To force into alternate law consider switching off 2 ADRs.