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# Rediscovering what was once known
- URL: https://www.pesec.no/rediscovering-what-was-once-known/
- Published: 2024-10-07T06:55:40.000Z
- Updated: 2024-10-07T06:55:40.000Z
- Description: Is there truly nothing new under the sun?
- Author: Bruno Pešec
- Tags: Strategy, Innovation

As I was re-reading *The Effective Executive*, a Drucker classic from 1966, I noticed something interesting. 

He advises one should ask for opinions and then "test them against reality" by asking the following questions:

"What do we have to know to test the validity of this hypothesis?"

"What would the facts have to be to make this opinion tenable?"

"What is the criterion of relevance?"

[Sounds familiar](https://www.pesec.no/step-by-step-guide-for-designing-lean-experiments/), [does it not](https://www.pesec.no/clarity-before-commitment/)?