David Allison

I don't know that it's going to come down.

I don't know of anything that says that it's not going to be monotonic, that's going to turn around.

but diminishing benefit and then starting to get into more costs of economic costs of buying fancy products, of the costs of your time and attention on it, the costs of not eating something else you might like.

I know you and I have both, I don't know if struggled with is the right word, but wrangled with fruit.

We both like fruit and we've both played with diets at times where we've minimized the consumption of fruit for other goals and yet both perhaps come back to it a little bit and said, I don't want to give up fruit.

And those are examples I think where there's some optimization, but I see no harm.

And I think the more refined your goals are, then the more it's reasonable to push it a little bit.

If I wanted to win the Olympics, I'm more motivated to push it.

For me, if I can lift one more pound of weight on the bench press, who cares?

There's not a single accepted definition.

The most commonly used classification system is called NOVA.

It's very controversial for many reasons, some social, some scientific, some linguistic or definitional.

It has to do with degrees of steps and the types of steps and so on involved.

These are very popular topics because they give us a new demon.

We talked earlier about the importance of demons.

Kelly Brownell, who as much as anybody has been one of the leading thinkers in the field of obesity research in the last half of the 20th century.

Is he at Yale still?

No, no.

He moved to Duke years ago and I think he may be semi-retired now.

But anyway, really good thinker.