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These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.

What is NOT random?

This challenging video takes a philosophical approach to discussing what information is. It begins by equating information to entropy. Entropy is explained as the degree of order or alternatively randomness that exists. Examples of ordered information are the arrangement of molecules in DNA, letters in words and words in sentences. This demonstrates how important order is for understanding. Highly ordered information, as above, is predictable and has a low entropy.  Information that is random has high entropy and is less predictable and consequently less useful.

We try to reduce information. For example, scientific theories attempt to explain more complex information by reduction into equations.

The final part of the video asks whether the universe is therefore random or ordered (predictable).  The answer turns to quantum mechanics.  Although information can in many cases be reduced and so is ordered (low entropy), the events in the universe are essentially random. This is because everything, being made from the same fundamental particles, are governed by quantum mechanical events. These events are determined by probability, i.e., a degree of randomness.

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