"LIBERALS ARE LIARS; CONSERVATIVES ARE CONFUSED"*
PEOPLE TEND TO PROJECT THEIR OWN MOTIVATIONS AND TRAITS INTO OTHERS. THAT'S WHY LIBERALS SAY CONSERVATIVES LIE, AND CONSERVATIVES SAY LIBERALS ARE DUMB.
Liberals tend to think that wrong statements or actions by opponents are willful efforts to be wrong, when quite often they are honest expressions from ignorance. Todd Akin was not pushing a falsehood to promote an anti-woman agenda. He honestly thought women couldn't (or that it was very difficult to) get pregnant from a rape. Sarah Palin was once caught calling for "profiling" to combat terrorism, then quickly followed use of that term up by saying we need to keep "profiles" on specific suspects. She wasn't trying to cover for a slip in support of something the Left considers "racist." She genuinely thought that's what the term meant. And Donald Trump Jr. didn't try to engage in or hide the smoking gun evidence of illicit "collusion." He sincerely was (is?) so politically naive that he had no idea what was going on, and so politically DUMB that he thought the business approach of being truthful but not more forthcoming than immediately necessary with information was the proper approach.
Conservatives know precise areas, but tend to be weak on the grand picture--i.e., they may study deep, but not broad. Liberals have broad perspective, but lie about particular areas. They may study deep, but can ignore what they find.
* NOTE: Firearms-related matters are probably the only exception to this formula--that is, it's the one place where liberals indeed genuinely will know less than conservatives and aren't necessarily lying when they spew garbage. It could be argued that religion is some contexts is another exception, but that is not nearly as universally the case as it is with gun matters.
