This week on The Best of Car Talk, Merriam-Webster helps answer the second most-asked question in Car Talk history: Which brother is “Click” and which is “Clack"? Unfortunately, they can’t the answer the most-asked question: How did these jerks get on the radio in the first place? Elsewhere, Lee’s mechanic told him he has a cracked "whoop tube," which may or may not refer to Lee’s Town Car; a wayward binky has Marietta’s driver’s seat stuck in a bad spot; and traveling musician Valerie can’t decide whether to dump the Dodge van that tows her trailer in favor of a Cadillac—sounds like a no-brainer to us! Also, on Stump the Chumps, we find out if Wendy used the snorkel test to figure out why her husband is fogging up her car. All this and more, this week on the Best of Car Talk.