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# Numbers are dangerous
- URL: https://www.pesec.no/numbers-are-dangerous/
- Published: 2022-07-19T07:00:35.000Z
- Updated: 2022-07-19T07:00:35.000Z
- Description: Dig deeper.
- Author: Bruno Pešec
- Tags: Newsletter, Bruno Unfiltered, Experimentation, Strategy, Leadership

Never take numbers at face value—especially when making important decisions. Understand what do they mean, how were they collected, and where are they coming from. Secondary data is fine, but primary data is king.

## Upcoming growth opportunities with Bruno

### November 26: Playing Lean Facilitator Training London

Learn how to teach Lean Startup in a fun and engaging way. Read more [here](https://www.playinglean.com/products/london-playing-lean-facilitator-training?ref=pesec.no).

## Three latest posts

[Reading notes: Strategy as a portfolio of real optionsA valuation approach that appreciates learning and adapting to market changes.![](https://storage.ghost.io/c/72/d5/72d522ba-f2e5-4415-a19c-d8f567c36347/content/images/size/w256h256/2020/04/BP-1000-1.png)Bruno PešecBruno Pešec![](https://storage.ghost.io/c/72/d5/72d522ba-f2e5-4415-a19c-d8f567c36347/content/images/2022/07/Strategy-as-a-portfolio-of-real-options.jpg)](https://www.pesec.no/reading-notes-strategy-as-a-portfolio-of-real-options/)

[Five steps to augmented strategySmall steps, great results.![](https://storage.ghost.io/c/72/d5/72d522ba-f2e5-4415-a19c-d8f567c36347/content/images/size/w256h256/2020/04/BP-1000-1.png)Bruno PešecBruno Pešec![](https://storage.ghost.io/c/72/d5/72d522ba-f2e5-4415-a19c-d8f567c36347/content/images/2022/07/Five-steps-to-augmented-strategy.jpg)](https://www.pesec.no/five-steps-to-augmented-strategy/)

[Demolish the echo chamberI’ll pass you the hammer.![](https://storage.ghost.io/c/72/d5/72d522ba-f2e5-4415-a19c-d8f567c36347/content/images/size/w256h256/2020/04/BP-1000-1.png)Bruno PešecBruno Pešec![](https://storage.ghost.io/c/72/d5/72d522ba-f2e5-4415-a19c-d8f567c36347/content/images/2022/07/Bruno-Unfiltered--1-.png)](https://www.pesec.no/demolish-the-echo-chamber/)

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*Bruno Unfiltered is a weekly newsletter bringing you Bruno's latest thoughts on contemporary topics in his signature style. No one and nothing is spared.*