Knowledge in practice
Philosophy of Science
Philosophy of science studies how scientific knowledge is formed, tested, explained, and limited.
Short answer
It asks questions that science uses but does not always answer by experiment alone: What counts as evidence? What makes an explanation good? When does a model represent the world well? How should uncertainty guide action?
Evidence and scientific reasoning
Scientific conclusions depend on observation, measurement, experimentation, modeling, and inference. Philosophy of science examines how these forms of evidence support a claim and how uncertainty should be expressed.
No observation arrives without context. Instruments, concepts, statistical choices, and background assumptions all shape how evidence is gathered and interpreted.
Theories, models, and explanation
Scientific theories do more than summarize data: they organize phenomena and support explanations, predictions, and new questions. Models can be useful even when they simplify or idealize reality.
A central issue is explanatory power. An account may predict accurately yet leave open why a result occurs, while another may offer understanding at the cost of precision. Different sciences balance these goals differently.
Objectivity and values
Scientific inquiry seeks objectivity through public methods, criticism, replication, and transparency. Objectivity does not mean that individual researchers have no values; it means claims can be checked beyond any one person.
Values also enter when societies decide which questions to fund, how to use discoveries, and which risks are acceptable. These are philosophical as well as scientific decisions.
From the archive
Read alongside this guide
“It is through wonder that people both now begin and first began to philosophize.”
“The human good is activity of soul in accordance with virtue.”
“Virtues arise in us neither by nature nor contrary to nature; we are fitted by nature to receive them, and are brought to completion by habit.”