Heaving Dead Cats: critical thinking toolkit

Recently The Edge published their annual Question, "What Scientific Concept Would Improve Everyone's Cognitive Toolkit?" which they posed to 164 people.

"The term 'scientific"is to be understood in a broad sense as the most reliable way of gaining knowledge about anything, whether it be the human spirit, the role of great people in history, or the structure of DNA. A "scientific concept" may come from philosophy, logic, economics, jurisprudence, or other analytic enterprises, as long as it is a rigorous conceptual tool that may be summed up succinctly (or "in a phrase") but has broad application to understanding the world."

Here are just a few excerpts that I think you might find interesting:

Sam Harris: We Are Lost In Thought

...Thinking is the substance of every social relationship and cultural institution we have. It is also the foundation of science. But our habitual identification with the flow of thought — that is, our failure to recognize thoughts as thoughts, as transient appearances in consciousness — is a primary source of human suffering and confusion. ...
...Our religions are clearly false, even if certain classically religious experiences are worth having. If we want to actually understand the mind, and overcome some of the most dangerous and enduring sources of conflict in our world, we must begin thinking about the full spectrum of human experience in the context of science.
But we must first realize that we are lost in thought.

P.Z. Myers: The Mediocrity Principle

...The mediocrity principle simply states that you aren't special. The universe does not revolve around you, this planet isn't privileged in any unique way, your country is not the perfect product of divine destiny, your existence isn't the product of directed, intentional fate, and that tuna sandwich you had for lunch was not plotting to give you indigestion. Most of what happens in the world is just a consequence of natural, universal laws — laws that apply everywhere and to everything, with no special exemptions or amplifications for your benefit — given variety by the input of chance.

The other day I wrote about Critical Thinking and how important it is. But knowing it's good for you and actually using it in your daily life are two very different things. I want to put together a Critical Thinking Toolkit.

One important tool is going to be Occam's Razor: "entities must not be multiplied beyond necessity" (entia non sunt multiplicanda praeter necessitatem). That's it in a nutshell right from William of Ockham, a Franciscan monk and English philosopher, theologian and logician in the 14th century.
Another way to put it is: The simplest explanation is usually the correct one. But don't get confused by the term, simple. It means: The hypothesis with the fewest assumptions is usually the correct one. When giving explanatory reasons for something, don't posit more than is necessary. Or, don't make any more assumptions than you have to.

So let's say you have 2 competing hypotheses that are basically equal in most respects. Then this principle would suggest that you choose the hypothesis that makes the fewest assumptions while still sufficiently answering the question. In science Occam's Razor is used as a rule of thumb (a heuristic) to help researchers develop good models.

In your life it can help you make decisions and choose what to think and what to believe (or not believe). You can use it as a heuristic as well, a great rule of thumb in your Critical Thinking Toolkit.

Sometimes atheists use Occam's Razor to argue against the existence of god since everything can be explained through natural means without complicating it with the supernatural.

Another example: Crop circles. There used to be 2 competing ideas for where crop circles came from. One was that flying saucers from an alien world made them. Another was that a person (or people) used some type of instrument to make the designs in the grass. Since there is no evidence for the flying saucers from outer space, and given how complicated and how many assumptions need to be made to make that argument work, Occam's Razor would suggest that the simpler explanation would be that humans did it with instruments. That is the argument that makes less assumptions.

Of course, the second argument could be wrong, but until there was more information, it was the preferable hypothesis. Then 2 guys admitted to the crop circle hoax in the 1990's. So that ended that debate for most people.

A quote by Carl Sagan is appropriate here: Extraordinary claims require extraordinary evidence. When it comes to the supernatural, Occam's Razor is a very valuable tool indeed.

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