Occam’s razor: the principle of parsimony

In short: Occam’s razor is a methodological principle stating that among several possible explanations for a phenomenon, the one with the fewest assumptions should be preferred. It’s named after the medieval philosopher William of Ockham.

In more detail: The principle doesn’t claim that the simplest explanation is always true, but that it’s methodically the most sensible starting point.

In detail

• Basic formulation: Entities should not be multiplied unnecessarily, meaning additional assumptions should only be made when truly necessary.
• Scientific application: In science, the principle is used to choose between competing theories when they explain the same observations equally well.
• No absolute truth: Occam’s razor is a heuristic tool, not a logical proof method, and simpler explanations can later turn out to be wrong.
• Example: conspiracy theories: Complicated explanations requiring many unproven additional assumptions often contradict the principle of parsimony.
• Distinction from simplification: The principle doesn’t demand artificially simplifying complex reality, but rather avoiding unnecessary theoretical complexity.
• Modern formulations: In today’s philosophy of science, the principle is often called the parsimony principle or the principle of simplicity.
• Limits of the principle: Some complex phenomena actually require complex explanations, which is why the principle must always be applied in the context of available evidence (logik-grundlagen-schluesse, trugschluesse-erkennen).