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American Focus > Blog > Tech and Science > Why Probability Probably Doesn’t Exist (but It’s Useful to Act like It Does)
Tech and Science

Why Probability Probably Doesn’t Exist (but It’s Useful to Act like It Does)

Last updated: December 26, 2024 3:28 pm
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Why Probability Probably Doesn’t Exist (but It’s Useful to Act like It Does)
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Life is unpredictable. We never know what the future holds or what has happened in the past. Uncertainty is a constant companion, reminding us of our ignorance about the world around us. Whether it’s the weather forecast, the outcome of a sports event, or the results of a scientific study, uncertainty lurks in every corner of our lives.

Expressing uncertainty is a common practice, using words like “could”, “might”, or “likely” to describe the likelihood of an event. However, these uncertain words can be deceiving. Take, for example, the Bay of Pigs invasion in 1961, where a CIA-sponsored plan to invade Cuba was deemed to have a 30% chance of success. The report presented to President John F. Kennedy described this as a “fair chance”, leading to a disastrous outcome. This highlights the importance of converting uncertain words into numerical probabilities to avoid misinterpretation.

Probability, the mathematical concept used to quantify uncertainty, has become a cornerstone of modern science. From weather forecasts to clinical trials, probability is used to make informed decisions based on available data. However, it is essential to recognize that probability is not an objective property of the world but a construct based on personal or collective judgments and assumptions.

In scientific contexts, such as clinical trials like the RECOVERY trials for COVID-19 treatments, probabilities play a crucial role in determining the significance of results. While statistical models provide valuable insights, they are built on subjective assumptions that may not always reflect the true underlying reality. It is essential to acknowledge the limitations of these models and conduct sensitivity analyses to ensure the robustness of conclusions drawn from probabilistic data.

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The concept of subjective probability, introduced by mathematicians like Frank Ramsey and Bruno de Finetti, emphasizes the role of personal beliefs and judgments in assigning probabilities to events. While objective probabilities may exist in controlled, repeatable situations, most real-world scenarios involve subjective assessments of uncertainty. It is through these subjective probabilities that we navigate the complexities of our uncertain world and make informed decisions.

In conclusion, while objective probabilities may be elusive in everyday life, it is pragmatic to act as if they exist. By embracing the idea of subjective probability and recognizing the limitations of our knowledge, we can navigate the uncertainties of life with humility and wisdom. Embracing uncertainty as a part of the human experience allows us to make sense of the world around us and make informed choices in the face of the unknown.

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