Rep. Andrew Weiner, after elaborately denying posting a controversial picture on Twitter — Hollywood beauties are described as posing “semi-nude,” Weiner posed semi-lewd — just admitted that he did. Sarah Palin refuses to admit she was wrong about Paul Revere’s Midnight Ride — though she claimed Revere’s purpose was to warn “the British”. John Edwards, now facing criminal charges, is in jeopardy of going to jail owing to a chain of events that began when he refused to admit having an affair — after boasting of being a family-values vice-presidential candidate. Presidential contender Newt Gingrich first refused to admit a dumb remark about Medicare reform, then claimed quotation of his own remark is “a falsehood.” Gov. Chris Christie of New Jersey at first refused to admit using a state helicopter for personal travel — though it was on film! — then denounced those who complained.

These are merely the last week’s examples of a troubling tendency among public figures — refusal to admit being wrong. Just as lying about what you did may be worse than what you did, refusing to admit an error may be worse than the error itself.

All human beings occasionally are wrong — trust me, I’ve had plenty of experience! Honest admission of error makes a person upright and sympathetic. Refusing to admit error, by contrast, suggests deviousness or even megalomania. The sort of person who huffs and puffs and refuses to admit a mistake does not belong in a leadership position.

In the era of YouTube and Twitter, it’s often easy to obtain the evidence of public error. That makes it all the more creepy when politicians stare into the camera and deny that they’ve made a mistake.

Yet we’re surrounded by politicians who deny their mistakes. In recent history, presidents Richard Nixon and Bill Clinton denied significant personal errors: one lost the White House as a result, the other nearly did. (I will skip the many instances in which public leaders would not admit to mistakes because they believed, rightly or wrongly, that refusal was in the national interest.)