- What we demand is solid facts.
- No, we don't. That is precisely what we don't demand.
- We don't demand solid facts. What we demand is a total absence of solid facts.

12 seconds sound clip from The Hitchhiker's Guide to the Galaxy (1981) - Episode 4 sitcom.

You can hear this line at 00:09:25.740 in the Blu-ray version of the TV Series.

Quote context

[...]

- Yes. Life, the Universe and Everything. There is an answer.

- There is an answer! At last!

- But I'll have to think about it.

- We demand admission! We demand that you can't keep us out. We demand that you can't keep us out!

- Who are you? Get out of here!

- I am Majikthise!

- And I demand that I am Vroomfondel!

- It's all right. You don't need to demand that.

- All right. I am Vroomfondel! And that is not a demand. That is a solid fact.

- What we demand is solid facts.

- No, we don't. That is precisely what we don't demand.

- We don't demand solid facts. What we demand is a total absence of solid facts.

- I demand that I may, or may not be Vroomfondel!

- Who are you?

- We are philosophers.

- That we may not be.

- Yes, we are! We are most definitely here as representatives of the Amalgamated Union of Philosophers, Sages and Luminaries, and other professional thinking persons.

- And we want this machine off, and we want it off now!

- We demand that you get rid of it!

[...]