When listening to politicians, you have to have a filter.

It’s important to be able to pick out what’s true and what’s false, and know when you’re being played the fool.

After last Thursday night’s debate, I knew exactly who was playing it straight, and it wasn’t the campaign that touts “straight talk.”

Sen. Joe Biden, Democratic vice-presidential nominee, and Gov. Sarah Palin, Republican vice-presidential nominee, debated Thursday, and proved Sen. John McCain’s choice of Palin was a mistake that will only hurt him in tonight’s debate against Sen. Barack Obama and in the future.

On Thursday night, Biden showed more want to engage in actual debate. Palin seemed content to throw out “maverick” and “Washington outsider” as many times as possible. He branched outside of talking points — something she seemed unwilling to do.

Though a debate should have guidelines, those debating ought to be able to challenge each other and step outside the lines occasionally.

Palin did a fine job debating — for someone whose experience is certainly limited. Biden simply brought more to the table in terms of political sustenance.

“Palin played fast and loose with the facts, getting the name of a general wrong and accusing Barack Obama of voting to raise taxes on lower-income families. She also didn’t bother answering Ifill’s questions but rather focused on delivering her sound bites,” said columnist Howard Fineman of Newsweek magazine.

Importantly, Biden helped Obama by not hurting Obama. He also projected a presidential presence, to assure us it’d be ok if he had to move into the No. 1 position — a scary thought when it comes to Palin.

“Senator Biden did well, avoiding one of his own infamous gaffes, while showing a clear grasp of the big picture and the details. He left Ms. Palin way behind on most issues, especially foreign policy and national security, where she just seemed lost,” said a New York Times editorial.

The Obama-Biden ticket is also at an advantage going into tonight’s debate, as the Democrats lead in most current polls.

Both Biden and Palin were smart to attack their opponents who weren’t there; Palin stuck to Obama and Biden to McCain.

But Biden came out on top. He proved he’s better educated and doesn’t have to stick to a script. After all, the vice-presidency isn’t scripted; problems will arise, and being a maverick might not solve every one.

Unfortunately for McCain and Palin, I hate being made to feel a fool.