In November 2018, Boeing told airlines that MCAS could not be overcome by pulling back on the control column to stop a runaway trim as on previous generation 737s.[91] Nevertheless, confusion continued: the safety committee of a major U.S. airline misled its pilots by telling that the MCAS could be overcome by "applying opposite control-column input to activate the column cutout switches".[92] Former pilot and CBS aviation & safety expert Chesley Sullenberger testified, "The logic was that if MCAS activated, it had to be because it was needed, and pulling back on the control wheel shouldn't stop it."[93] In October, Sullenberger wrote, "These emergencies did not present as a classic runaway stabilizer problem, but initially as ambiguous unreliable airspeed and altitude situations, masking MCAS."[94]