Neat idea! Anecdotally, though, I got 4/6 while knowing nothing about Haskell just by meta-analysis - a type signature including a "Foldable" term is most like

Neat idea! Anecdotally, though, I got 4/6 while knowing nothing about Haskell just by meta-analysis - a type signature including a "Foldable" term is most likely to relate to a method with "Fold" in the name :)