> The big question is whether it is closer to the 0 or closer to the 18. And to be sure, there is no one-size-fits-all answer. What the number is probably depe

> The big question is whether it is closer to the 0 or closer to the 18. And to be sure, there is no one-size-fits-all answer. What the number is probably depends on the task at hand--though I would argue that (all other things being equal) it's probably closer to 0 than 18 for any job.