That's fantastic. I love Big Placebo.

So we do random assignment, placebo controlled,

So here are the 4 concepts again partially observable versus fully, stochastic versus deterministic, continuous versus discrete, adversarial versus benign.

We leap into the arms of Big Placebo.

And of course, also there's the placebo effect.

Bush versus Gore.

Unexpected versus habitual.

Intuitive versus analytical?

5 versus 5.

But, actually, the point of placebo education is interesting.

So firstly, trials against placebo everybody thinks they know that a trial should be a comparison of your new drug against placebo.

Universal City Walk versus

Languages. Material versus method.

Hand versus the computer.

So inertia versus momentum.

And fun versus philanthropy.

The seeding is this picking of Germany versus Japan, Sweden versus Australia.

Fifty versus 35, that's a big move. Eleven versus nine? Come on.

Not just hot versus saved but was kind of new versus old.

invading Iraq versus liberating Iraq

redistributing wealth versus confiscating earnings.

So again, radical versus conservative.

Negative 1 versus negative 2?

Pure spirals versus pure ellipticals.

The central surface brightness versus

Intrinsic motivators versus extrinsic motivators.

Six weeks, city versus city.

Today's game, Slytherin versus Gryffindor!

lived much longer and did better than people who got placebo.

We don't see it as a virtual versus physical an Amazon.com versus Barnes amp Noble.

Now, (Laughter) what does that have to do with the placebo effect?

But if you change the form that you give the placebo in,

And yet, repeatedly, you consistently see people doing trials still against placebo.

'number of plucks versus each symbol.'

So instead of R of T versus time, we plot a distance of some sort, versus redshift.

And if you want the ultimate in placebo, you've go to the needle.

And one was a live vaccine, the other was just a control placebo.

And, I thought, well maybe, you know, it's just a placebo response, right?

Let me talk about discrete versus continuous.

Finally, we distinguish benign versus adversarial environments.

4 and 7 8 versus 49 9.

5 and 4 9 versus 40 7.

Today we'll talk about classification versus regression.

Where the first digit stands for covered versus uncovered, and the second digit stands for fail versus pass.

The velocity dispersion versus radius in the lower left and velocity dispersion versus luminosity on the lower right.