Dermatology
What each dermatology question is really asking, how to structure the answer, and where the marks are likely to sit.
The prompt asks for lesion type, distribution, colour and ancillary findings first. Naming the diagnosis and working backwards is the mistake this structure exists to prevent.
Every detail in this case is a risk factor placed deliberately: forty years outdoors, a mole that changed, bled and is now moist, and a father who went into the barn at midday while Leonard stayed in the sun.
Each case contains one finding that settles the diagnosis and at least one that points confidently the wrong way — including a size criterion that would rule out the correct answer in case two.