Political correctness
When William Shakespeare attempted to flirt using terms that Martha Jones found offensive, the Tenth Doctor said that it was "political correctness gone mad". (TV: The Shakespeare Code)
Jo Jones said the same thing when Petronella Osgood said that calling the Sea Devils by that name was likely to be speciesist. To avoid the term, Osgood called them Reptilia sapiens. (AUDIO: Tidal Wave)
When Kate Stewart said that Jo, Mike Yates and John Benton were the most experienced options to take local control of UNIT, Jo said that that was a politically correct way of saying that they were old. (AUDIO: United)
Because of political correctness, the Silvans could not be described as "pod people". (AUDIO: Truant)