Trudeau is one of the great masters of dialogue in the history of American culture. Observe the fine calibration of his timing, the division of lines through the progression of panels. Many of his best strips feature a pause — a "blank" third panel with no dialogue, followed by a punch line where a character backs off on the position they'd taken in the second panel, realizing the absurdity of their own argument. Or look at the way Mike, the silent observer, is deployed in the example above (larger image), from the "Boopsie Poses for Playboy" sequence, May 23, 1979.
More of the strip's greatest hits at this link.