No easy answer in the debate that’s become too toxic to have

Picture this: you’re the parent of a sporting prodigy, a teenage girl who seems destined for global success. Her whole life, she has worked with obsessive dedication, placing sport above academic or professional pursuits to chase her ultimate dream: Olympic gold.

When she gets there, she lines up beside a cluster of athletes with differences of sexual development (DSD), who, in a strictly biological sense, are part-male. Some were born with internal testes which, when they hit puberty, flooded their system with testosterone, giving a boost in muscular development that is unavailable to more than 99% of their female peers.