This reflects the principle that people may be able to write in a way that’s technically proficient but not emotionally moving. The stimulus, however, refers to people’s ability to identify what category something belongs in.

This reflects the idea that applying an abstract principle requires more expertise than discovering it. The stimulus is about people’s ability to identify whether something belongs in a category; it doesn’t compare the knowledge of two different groups of people.

This describes how people can identify a piece that belongs in the “waltz” category without knowing exactly what the boundaries of that category are.

This reflects the principle that those who most enjoy something are not necessarily the best at describing it. The stimulus doesn’t refer to people with any particular feelings; it’s only concerned with their abilities to identify whether or not something belongs in a particular category.

This describes how most people know the rules of the game despite generally not being good at playing it. The stimulus, however, notes that most people do not know the specific rules of grammar.