Reasoning based on cost has been strenuously resisted; it violated the Hippocratic Oath, was associated with rationing, and derided as putting a price on life... Indeed, many physicians were willing to lie to get patients what they needed from insurance companies that were trying to hold down costs.

The systematic experimental study of reproducible errors of human reasoning, and what these errors reveal about underlying mental processes, is known as the heuristics and biases program in cognitive psychology. This program has made discoveries highly relevant to assessors of global catastrophic risks.

The question of causality is complex. For some philosophers and physicists, time might not exist. And since cause-and-effect reasoning needs the concept of time - of one thing preceding another - the effort to establish causality is a mug's game, an infinite regression of increasingly unanswerable questions.

Trying to understand the way nature works involves a most terrible test of human reasoning ability. It involves subtle trickery, beautiful tightropes of logic on which one has to walk in order not to make a mistake in predicting what will happen. The quantum mechanical and the relativity ideas are examples of this.

Evidence-based reasoning underpins all scientific thinking, and it involves testing hypotheses or theories against data. Validating a theory requires replicable measurements from independent groups with different equipment and methods of analysis. Convergence of evidence is critical to the acceptance of a scientific idea.

Benn was brute force, wasn't he? But he found God when he was 40... and the only reason I beat him, was because I was brought up in the church. It teaches you to be calm to be objective and steady and the reasoning I used beat him - and he found it when he was 40. I didn't change anything: there is only one way, to be calm, gentle and true.

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