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Epistemology

A dart hitting the bullseye. Photo by Silvan Arnet on Unsplash.

The Blind Truth-Seeker

Karl Popper’s theory of knowledge explained through a blind man throwing darts. The metaphor exposes common errors in epistemology.
Dennis Hackethal 19 Aug 2026
The hands of a scientist using forceps to extract chorion from Zebrafish embryos. Photo by National Cancer Institute on Unsplash.

Experimental Controls Aren’t What You Think

Why scientists use experimental controls like randomization and blinding – and what these methods are actually designed to do.
Dennis Hackethal 13 Aug 2026
Karl Popper. By LSE library.

Taking Popper Too Far, Again

Karl Popper rejected the possibility of a scientific method and the justification of scientific theories – but not all methods or justification. Some David Deutsch followers take him too far.
Dennis Hackethal 02 Aug 2026
Photo by Pankaj Patel on Unsplash.

Rationality as Computation

Why rational decision-making should be expressed as code, and why serious epistemologists need programming skills.
Dennis Hackethal 02 Aug 2026
Photo by Humberto Arellano on Unsplash

Insentience in Animals and Sleepwalkers

The behavior of animals and sleepwalkers challenges our assumptions about consciousness and which tasks require it.
Dennis Hackethal 29 Jun 2026
One way or another? How do we choose rationally?

Simple Refutation of David Deutsch’s ‘Hard to Vary’

David Deutsch says we form rational preferences by choosing explanations that are hardest to vary. But that doesn’t work. I explain why.
Dennis Hackethal 02 May 2026
Computer code. Photo by Shahadat Rahman / Unsplash

What Makes a Professional Epistemologist?

What distinguishes a hobby epistemologist from a professional one? What criteria should you meet to be successful in this field?
Dennis Hackethal 20 Mar 2026

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