In reality, I am not going to, however he is happily reading his book, would be happy for ten minutes while I pick his brother up and both next door neighbours are in. It seems silly that I can't leave him because society says so when I know he would be fine and knows what to do in an emergency. He often stays in the car through choice while I go into a shop - to me that is more risky as we are out and about but he prefers that to being dragged into shops.
So, WIBU to leave him at home for ten minutes while both neighbours are in?