Explaining jokes rarely works well, but I have to ask: is calling a bushel a "unit of weight" part of the joke? Traditionally a bushel is typically a unit of

Explaining jokes rarely works well, but I have to ask: is calling a bushel a "unit of weight" part of the joke? Traditionally a bushel is typically a unit of volume, not of weight: https://en.wikipedia.org/wiki/Bushel https://en.wikipedia.org/wiki/Bushel As the Wikipedia article points out, it's true that in modern commerce a bushel is often defined as a weight, but this weight is different for each item that might be in the bushel. That is, it's a legally defined mass approximately equal to one bushel of that material. But a peck (so far as I know) has never had a defined weight equivalent. So to the extent that a bushel is equal to four pecks, it's a unit of volume. Wouldn't it make for a better (if still dumb) joke to start "A bushel is a unit of volume equal to four pecks"?