Jon Holmes kicked off the Big Debate by mentioning party-goers in New York, who have shown their mettle this week by trying their luck at various Olympic sports.
The mere mention of the word mettle got up the nose of caller Donald, who despises both courage ("mettle has caused all the world's wars") and metal ("the government want to control us with magnets").
Fellow listener Paul disagreed, of course, and a lively debate ensued, focusing on plastic frying pans, wooden pokers and Sebastian Coe's desire to see all future Olympic medals made out of soup.
So metal (and, indeed, mettle). Do we need it?
Listen to the full debate above