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Science

Main article: Philosophy of science

The scientific approach is usually regarded as an exemplary process of how to gain knowledge about empirical facts. Scientific knowledge includes mundane knowledge about easily observable facts, for example, chemical knowledge that certain reactants become hot when mixed together. It also encompasses knowledge of less tangible issues, like claims about the behavior of genes, neutrinos, and black holes.

A key aspect of most forms of science is that they seek natural laws that explain empirical observations. Scientific knowledge is discovered and tested using the scientific method. This method aims to arrive at reliable knowledge by formulating the problem in a clear way and by ensuring that the evidence used to support or refute a specific theory is public, reliable, and replicable. This way, other researchers can repeat the experiments and observations in the initial study to confirm or disconfirm it. The scientific method is often analyzed as a series of steps that begins with regular observation and data collection. Based on these insights, scientists then try to find a hypothesis that explains the observations. The hypothesis is then tested using a controlled experiment to compare whether predictions based on the hypothesis match the observed results. As a last step, the results are interpreted and a conclusion is reached whether and to what degree the findings confirm or disconfirm the hypothesis.

The empirical sciences are usually divided into natural and social sciences. The natural sciences, like physics, biology, and chemistry, focus on quantitative research methods to arrive at knowledge about natural phenomena. Quantitative research happens by making precise numerical measurements and the natural sciences often rely on advanced technological instruments to perform these measurements and to setup experiments. Another common feature of their approach is to use mathematical tools to analyze the measured data and formulate exact and general laws to describe the observed phenomena.

The social sciences, like sociology, anthropology, and communication studies, examine social phenomena on the level of human behavior, relationships, and society at large. While they also make use of quantitative research, they usually give more emphasis to qualitative methods. Qualitative research gathers non-numerical data, often with the goal of arriving at a deeper understanding of the meaning and interpretation of social phenomena from the perspective of those involved. This approach can take various forms, such as interviews, focus groups, and case studies. Mixed-method research combines quantitative and qualitative methods to explore the same phenomena from a variety of perspectives to get a more comprehensive understanding.

The progress of scientific knowledge is traditionally seen as a gradual and continuous process in which the existing body of knowledge is increased at each step. This view has been challenged by some philosophers of science, such as Thomas Kuhn, who holds that between phases of incremental progress, there are so-called scientific revolutions in which a paradigm shift occurs. According to this view, some basic assumptions are changed due to the paradigm shift. This results in a radically new perspective on the body of scientific knowledge that is incommensurable with the previous outlook.

Scientism refers to a group of views that privilege the sciences and the scientific method over other forms of inquiry and knowledge acquisition. In its strongest formulation, it is the claim that there is no other knowledge besides scientific knowledge. A common critique of scientism, made by philosophers such as Hans-Georg Gadamer and Paul Feyerabend, is that the fixed requirement of following the scientific method is too rigid and results in a misleading picture of reality by excluding various relevant phenomena from the scope of knowledge.

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