Science works by applying a robust process of questioning, testing, analysing, reporting and refining initial ideas to arrive at credible conclusions. This is known as the “scientific method”.
Initial questions are formed into testable ideas called a “hypothesis”. A process of experiments, careful observations or other forms of research is then undertaken, and the results analysed, shared and scrutinised by others. If the findings are confirmed by further research, undertaken multiple times by other researchers, they may grow into generally accepted explanations or conclusions, sometimes called “theories”.
As you can see, a scientific theory is not “just a guess.” It is a well-supported explanation of an insight, observation or discovery, thoroughly tested and backed by evidence, for example, the theory of gravity or the theory of evolution.
Progress in science relies on transparency and robust critiques. Researchers must describe how they conducted their studies so others can validate or repeat them. Peer review, where other experts examine research work before it is applied, published or presented to stakeholders, also helps ensure reliability.
It is important to keep in mind that science is generally a work in progress, and there may be flaws. Mistakes can happen, biases can occur, and experimental processes can be less than robust. This is why openness, replication, and critical discussion are so important. These checks and balances keep the discipline of science rigorous, trustworthy and reliable.
Just as no judge will convict someone without evidence, so too a scientist will not leap to a conclusion without evidence. Any claim made without evidence is just an opinion.
For evidence to be valid in the scientific context it needs to be observable, measurable, and replicable.
References are a form of evidence that often get used because these citations of earlier work provide a foundation on which new ideas, research or observations can be tested and verified. References allow others to trace where information has come from, verify its credibility and build on it. The use of references also ensures claims are not made in isolation or without a reliable basis in fact.
Not all evidence is equally credible. For example, a single experiment is less powerful than a series of studies showing the same result. This is why over time, the body of references around a topic creates a stronger framework for testing, discovering and arriving at conclusions.
For any science-curious person, checking whether claims are supported by credible references is a quick way to judge reliability.
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Science is generally not in the business of promoting absolute truths except in very limited cases, such as the laws of physics or the canon of facts about the Earth’s geometry and its relationship to the other bodies in the solar system. In most areas of scientific discovery and knowledge, the conclusions, theories and insights of science offer the best possible and most likely explanation for something, based on current evidence.
As the work of experimenting and testing continues, new evidence or insights may emerge, which is why scientific advice can change. As knowledge deepens, the recommendations based on that knowledge will improve.
For example, nutrition advice has evolved as long-term studies reveal more about the relationship between diets and health. This is what progress is all about, because science is an ongoing conversation, constantly refined by new data and informed perspectives.
When guidance changes, therefore, it is more proof that the scientific method is working. The strength of science is its adaptability, honesty and ability to self-correct and evolve.
A citation is a reference to another piece of work that supports or informs an insight or statement. Citations are the scaffolding of science and connect current work with the historical body of research, sometimes known as the “canon”.
For readers, citations provide a way to track information back to its source. They also show transparency, allowing others to judge whether claims are supported by credible and suitable evidence.
Academic citations ultimately give credit where it is due and allow knowledge to be checked and expanded.
