Twenty years ago, my son challenged me during dinner one night.

A 20-year-old biology major, he and his tutorial group had been studying attention deficit hyperactivity disorder.

His accusation: “Dad, you’re a GP! How can you have missed it? I so have all the symptoms!”

My reply was spontaneous: “Yes, so do I. We’re both subsyndromal and doing well in life. You don’t need medication. Just make sure you have an interesting and varied job.”