Portal:Philosophy of science
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The 'philosophy of science' is the branch of philosophy that studies the philosophical assumptions, foundations, and implications of science, including the formal sciences, natural sciences, and social sciences. In this respect, the philosophy of science is closely related to epistemology and the philosophy of language. Note that issues of scientific ethics are not usually considered to be part of the philosophy of science; they are studied in such fields as bioethics and science studies.
In particular, the philosophy of science considers the following topics: the character and the development of concepts and terms, propositions and hypotheses, arguments and conclusions, as they function in science; the manner in which science explains natural phenomena and predicts natural occurrences; the types of reasoning that are used to arrive at scientific conclusions; the formulation, scope, and limits of scientific method; the means that should be used for determining when scientific information has adequate objective support; and the implications of scientific methods and models, along with the technology that arises from scientific knowledge for the larger society.
 The discipline is concerned with five central questions: How are sentences composed into a meaningful whole, and what are the meanings of the parts of sentences? What is the nature of meaning? (i.e., What exactly is a meaning?) What do we do with language? (How do we use it socially?) How does language relate to the mind, both of the speaker and the interpreter? Finally, how does language relate to the world?  It was on this page that Galileo first noted an observation of the moons of Jupiter. This observation upset the notion that all celestial bodies must revolve around the Earth. Galileo published a full description in Sidereus Nuncius in March 1610.
Karl Popper (1902-1994) was an Austrian and British philosopher, counted among the most influential philosophers of science of the 20th century. His book The Logic of Scientific Discovery criticises psychologism, naturalism, inductionism, and logical positivism, and puts forth his theory of potential falsifiability being the criterion for what should be considered science. He coined the term critical rationalism to describe his theory, rejecting classical empiricism, and holding that scientific theories are universal in nature, and can only be tested indirectly, with reference to their implications. He also held that scientific theory, and human knowledge generally, is irreducibly conjectural or hypothetical, and is generated by the creative imagination in order to solve problems that have arisen in specific historico-cultural settings.
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