Absolutes aren't really helpful, nobody? Phelps himself comes over and he can't swim alone?
The point being is that there is no algorithm to sort this out. I would trust a young teen [just an example] to swim alone if they have demonstrated good risk behavior and swimming experience.
> Phelps himself comes over and he can't swim alone?
Nope. No buddy, no swimming. I don't even swim alone, even though I know chances are it would be fine 99% of the time.
> The point being is that there is no algorithm to sort this out.
Sure there is.
if swimmer_cout < 2:
throw NoSwimException
The risks of something going wrong in an instant are incredibly high with water. A small problem can lead to massive consequences when it comes to easily interrupting your breathing. Someone bumps their head hard in the yard, they'll be out for a few minutes in the yard. Someone bumps their head hard in the pool, they're dead. Someone faints in the living room, they'll be back up in a few minutes. Someone faints in the pool, they're dead.
The point being is that there is no algorithm to sort this out. I would trust a young teen [just an example] to swim alone if they have demonstrated good risk behavior and swimming experience.