Humour

Tamsin Drew was accused of having a lack of either intelligence or a sense of humour. (AUDIO: Nevermore)

Elizabeth Meadows, after conversion into a Cyberslave, dismissed humour as "a redundant application of intellect." The Eleventh Doctor disagreed, finding it often came in handy in a tight spot. (GAME: Blood of the Cybermen)

The Sontarans observed that humour could increase the efficiency of humans by up to 84% in stressful situations. Slite made a recommendation to Sontaran Command that they consider its useful applications. (AUDIO: The Sontarans)

Max, a synthetic robot built by the Landoran Alliance, was not programmed for humour and found it illogical. When he unintentionally caused Sarah Jane Smith to laugh, she explained that lack of logic was often why people found it so fun, and that it usually made them feel better in bad times. (PROSE: A Device of Death)