Most important, at a time when Fox, MSNBC and CNN routinely mix news and entertainment, larding their 24-hour schedules with bloviation fests and marathon coverage of sexual predators and dead celebrities, it’s been “The Daily Show” that has tenaciously tracked big, “super depressing” issues like the cherry-picking of prewar intelligence, the politicization of the Department of Justice and the efforts of the Bush White House to augment its executive power.

For that matter, the Comedy Central program  which is not above using silly sight gags and sophomoric sex jokes to get a laugh  has earned a devoted following that regards the broadcast as both the smartest, funniest show on television and a provocative and substantive source of news. “The Daily Show” resonates not only because it is wickedly funny but also because its keen sense of the absurd is perfectly attuned to an era in which cognitive dissonance has become a national epidemic. Indeed, Mr. Stewart’s frequent exclamation “Are you insane?!” seems a fitting refrain for a post-M*A*S*H, post-“Catch-22” reality, where the surreal and outrageous have become commonplace  an era kicked off by the wacko 2000 election standoff in Florida, rocked by the terrorist attacks of Sept. 11 and haunted by the fallout of a costly war waged on the premise of weapons of mass destruction that did not exist.

MR. STEWART describes his job as “throwing spitballs” from the back of the room and points out that “The Daily Show” mandate is to entertain, not inform. Still, he and his writers have energetically tackled the big issues of the day  “the stuff we find most interesting,” as he said in an interview at the show’s Midtown Manhattan offices, the stuff that gives them the most “agita,” the sometimes somber stories he refers to as his “morning cup of sadness.” And they’ve done so in ways that straight news programs cannot: speaking truth to power in blunt, sometimes profane language, while using satire and playful looniness to ensure that their political analysis never becomes solemn or pretentious.

“Hopefully the process is to spot things that would be grist for the funny mill,” Mr. Stewart, 45, said. “In some respects, the heavier subjects are the ones that are most loaded with opportunity because they have the most  you know, the difference between potential and kinetic energy?  they have the most potential energy, so to delve into that gives you the largest combustion, the most interest. I don’t mean for the audience. I mean for us. Everyone here is working too hard to do stuff we don’t care about.”

Offices for “The Daily Show” occupy a sprawling loftlike space that combines the energy of a newsroom with the laid-back vibe of an Internet start-up: many staff members wear jeans and flip-flops, and two amiable dogs wander the hallways. The day begins with a morning meeting where material harvested from 15 TiVos and even more newspapers, magazines and Web sites is reviewed. That meeting, Mr. Stewart said, “would be very unpleasant for most people to watch: it’s really a gathering of curmudgeons expressing frustration and upset, and the rest of the day is spent trying to mask or repress that through whatever creative devices we can find.”