In the link posted recently to the Psychology Today article on psychopathy, this section screamed "Doug Ford". (APD = antisocial personality disorder.)
"Insincere speech
"Ranging from what the PCL describes as “glibness” and “superficial charm” to Cleckley’s “untruthfulness” and “insincerity,” to outright “pathological lying,” there is a trend toward devaluing speech among psychopaths by inflating and distorting it toward selfish ends. The criteria for APD include “conning others for personal profit or pleasure.” One concerned father of a young sociopathic woman said, “I can't understand the girl, no matter how hard I try. “It's not that she seems bad or exactly that she means to do wrong. She can lie with the straightest face, and after she's found in the most outlandish lies she still seems perfectly easy in her own mind” (Cleckley, 1941, p. 47). This casual use of words may be attributable to what some researchers call a shallow sense of word meaning. Psychopaths do not show a differential brain response to emotional terms over neutral terms that normal people do (Williamson et al., 1991). They also have trouble understanding metaphors and abstract words."