What is Science?

Science is often misunderstood as a static collection of facts or a quest for absolute, irrefutable truth. In contrast, this paper defines science as a critical method for learning about the world. At its core, science is not about proving theories correct, but about formulating statements that are potentially falsifiable—meaning there must be some imaginable observation that could prove them wrong. If a statement cannot be tested or is true by definition (a tautology), it falls outside the realm of science.

The scientific method is characterized by a structured, iterative process. It begins with an observation that presents a puzzle, followed by the construction of a theory or model—a set of logically consistent statements that explain why the observed phenomenon occurs. A good model is a simplified picture of reality designed for a specific purpose, rather than a comprehensive description. From these models, researchers derive testable implications (hypotheses). The final steps involve observing the world to test these implications and evaluating the results. Crucially, scientists should actively seek to falsify their own theories; a theory that survives harsh testing is more credible than one that has only been subjected to easy, confirmatory tests.

The authors emphasize the importance of logical validity in scientific arguments. They distinguish between valid arguments (where accepting the premises compels one to accept the conclusion) and invalid ones. A key asymmetry exists in scientific testing: while confirming observations can never prove a theory is true, a single disconfirming observation can logically prove a theory is false. This leads to the adoption of falsificationism, an approach where scientific merit is measured by how well a theory stands up to rigorous attempts at refutation. Because we can never achieve absolute certainty, all scientific knowledge remains tentative.

Understanding science as a critical, deductive process is essential for researchers, particularly in political science. It protects scholars from being manipulated by invalid arguments and encourages a culture of humility and transparency. By treating all knowledge as provisional and inviting criticism, the scientific community creates a system where individual biases are checked by others, ultimately allowing for a more objective understanding of the social and natural world.