Stupidity

Stupidity was a lack of intelligence. Those who demonstrated stupidity were referred to as being stupid.

The Ninth Doctor once snidely called humans "stupid apes". (TV: Rose)

The Eleventh Doctor claimed that alien technology plus human stupidity was "unbeatable". (TV: The Day of the Doctor)

Danny Pink once asked, "how stupid do you think I am?", to which the Twelfth Doctor muttered, "I'm willing to put a number on it." (TV: The Caretaker)

Jack Harkness called Rhys Williams stupid for his belief that the appearances of the Sycorax spaceship and the Cybermen during the Battle of Canary Wharf were mass hallucinations caused by terrorists contaminating water supplies with drugs. (TV: Everything Changes)

The Third Doctor stated that the Ogrons' stupidity was the best defence against mind probes. (TV: Frontier in Space)