Acknowledged bias
Many critics accuse Penn and Teller of being biased in their approach to debunking their opponents' arguments. For example, Chaz Miller, who was interviewed for the "Recycling" episode, said that Bullshit! attempts to exclude certain information if it does not favor the show's position.[11]
In the episode "Family Values", Penn said, "... we're fair and we never take people out of context. We're biased as all fuck. But, we try to be honest."[12] Still, some critics who sympathize with the duo's over-arching message have expressed regret that they can occasionally slip into the same sensationalism as their targets. This was summed up in a review by Slate which stated: "One of the unwritten rules for winning an argument against an inflammatory, irrational opponent is to calmly adhere to a loftier set of rhetorical standards. Penn and Teller showily throw this notion out the window."[13]
While Penn and Teller are self-professed skeptics, critics have been quick to note that Bullshit! is not dedicated to fact-based debunking or inquiry. An otherwise favorable review by The Onion A.V. Club noted:
Bullshit! isn't journalism, exactly. The show is one-sided by design: P&T's field interviewers rarely confront their subjects with the evidence against them, preferring to let the crackpots ramble on so that Jillette's voiceover rejoinders can score points without inciting a real argument.[14]
During an interview on the January 31, 2007 episode of The Skeptics' Guide to the Universe, Teller claimed that the final episode of the show would be about "the bullshit of Bullshit!" and would detail all the criticisms that they themselves had of the show.[15]