What is Occam’s Razor?

The term Occam’s Razor is attributed to the 14th-century English philosopher and theologian William of Ockham (also spelled Occam). While the term itself might not have been coined by William of Ockham, the principle associated with it has been associated with his philosophical approach.

Occam’s Razor, also known as the principle of parsimony, is a problem-solving or decision-making tool used in various fields, including science, philosophy, and law. It suggests that, when faced with competing hypotheses or explanations, the simplest one is often the most likely or correct.

In essence, Occam’s Razor advocates for choosing the explanation that requires the fewest assumptions and complexities while still accounting for the available evidence. It emphasizes simplicity and elegance in reasoning, favoring explanations that do not introduce unnecessary complexities or entities beyond what is required.

Example
A classic example to illustrate Occam’s Razor is the case of planetary motion. Before the heliocentric model proposed by Nicolaus Copernicus, people believed in the geocentric model, which placed the Earth at the center of the universe. To account for the apparent retrograde motion of planets (the periodic backward movement observed from Earth), the geocentric model required the introduction of complicated epicycles and intricate motions. However, Copernicus proposed a simpler heliocentric model, where the planets revolve around the sun, which eliminated the need for complex explanations and provided a more elegant solution.

In this example, Occam’s Razor favors the heliocentric model because it requires fewer assumptions and complexities compared to the geocentric model. While both models can account for the observed planetary motion, the simpler explanation is generally preferred.

Consider a detective investigating a crime scene where a valuable piece of artwork has been stolen from a museum. The detective has two possible explanations for the theft:

1. Complex Explanation
   The theft was orchestrated by an international art smuggling syndicate, involving a team of highly skilled professionals who bypassed the museum’s state-of-the-art security systems, forged documents, and coordinated an elaborate heist.
   
2. Simple Explanation
   The theft was carried out by a museum employee with access to the artwork, who took advantage of a temporary lapse in security protocols.

In applying Occam’s Razor, the detective would consider the simple explanation (museum employee theft) as the more likely scenario. It requires fewer assumptions and complexities compared to the complex explanation involving an international syndicate. The detective would investigate the possibility of an inside job, focusing on the motives and actions of the museum staff, examining security footage, and gathering evidence that supports the simpler explanation.

By favoring the simpler explanation, the detective is more likely to allocate resources efficiently, follow logical leads, and reach a solution that is consistent with the available evidence. Occam’s Razor helps guide the detective’s reasoning and minimizes the risk of unnecessarily complicating the investigation with elaborate theories or assumptions.

Occam’s Razor serves as a heuristic or rule of thumb for guiding scientific and logical reasoning. It suggests that when confronted with multiple explanations or hypotheses, the one that minimizes unnecessary assumptions and complexities should be preferred, as it often leads to a more accurate or plausible understanding of the phenomena under consideration.

Variants

• Tim Ferriss‘s variant on Occam’s Razor, in order to open up your mind to find the simplest solution to a challenge: “How would this look like if it was easy?“
  
• Elon Musk’s variant on Occam’s Razor: “The most entertaining outcome is the most likely, as viewed by a third-party audience“.
  
• Jonathan Nolan‘s variant on Occam’s Razor: “The most ironic outcome is the most likely“.
  
• Tacitus’ Razor is a philosophical principle derived from the Roman historian Tacitus, suggesting that the simplest explanation, typically attributing actions to human nature or self-interest, is often the correct one, especially in the absence of clear evidence. Unlike Occam’s Razor, which favors the least complex hypothesis, Tacitus’ Razor focuses on interpreting motives, positing that people act out of personal gain or instinct unless proven otherwise. For example, it might explain a politician’s decision as driven by ambition rather than altruism.

For reference, see 10:16 – 11:06 min in the below video from 2023 on the Fox News YouTube channel, in which Tucker Carlson interviews Elon Musk. However, as the full version of the interview have proved challenging to find on the Fox News YouTube channel (perhaps it has been taken down), this is the full video re-posted on the channel “Imnotchad“.