Professor Derk-Jan Dijk

At a cost, of course, you have to put in an awful lot of effort.

We can't do the experiment.

We can't do a randomized control trial to find out the answer to your question, Alan.

So I'm very sorry.

It's ethically not allowed.

So annoying.

I can completely fully agree with that position.

But what does it mean being able to still function?

When you look very carefully, you can say after three days without sleep, I'm still very good at riding my bike.

At the same time, that person may be very much impaired if they have to give a speech.

Whereas for the other person, it's exactly the other way around.

I'm sure that Sophie without sleep can still do that rowing very, very well.

Just to make it clear, in terms of the Guinness World Records, not often have we really made sure that people under those situations are always awake because we didn't objectively record sleep.

What does it mean I haven't slept now for seven days?

Is that really true?

We don't know.

So...

We are not going to be awake for seven days in a row.

No, except we are.

No, what I would do is if you want to live without sleep for seven days or longer, just turn into a robot and it will be fine.