Fact

A fact is something that is true. It is a real thing that happened.

Facts are not just opinions. They stay true even if you do not believe them. You can use books to check them.

Scientists find facts by watching things closely. They use tests to see what is real. This helps them learn.

History also uses facts. People look at the past to see what occurred. They try to find the truth.

Some facts are about stars. Other facts are about people. Facts help us know our world.

A fact is something that is true. It is a real thing that happened. Facts are not just opinions. They stay true even if you do not believe them. You can use books to check them.

There are many kinds of facts. Some are about stars. For example, the Sun is a star. Other facts are about history. One historical fact is that Abraham Lincoln was the 16th president of the United States. Some facts are about language. One fact is that a sentence can contain words.

Scientists find facts by watching things closely. They use tests to see what is real. This is called the scientific method. They use careful steps to check their work. These facts are based on what they see and measure. They use this to build theories.

History also uses facts. People look at the past to see what occurred. Some people say it is hard to find all the truth. This is because people might have biases. A bias is a way of looking at things that is not neutral. Historians try to be fair when they gather facts. They want to have a conversation with the past.

A fact is a piece of true information about the real world. It describes a thing that has happened or a way things are. Facts are special because they do not depend on what people believe. You can have an opinion, but a fact stays the same. For example, the statement "the Sun is a star" is an astronomical fact. Another example is a linguistic fact, like saying a sentence contains words. Even history uses facts, such as knowing Abraham Lincoln was the 16th president of the United States. Some people even say he was assassinated, which is also a historical fact.

There are different ways to find and check if something is a fact. Scientists use a special way of working called the scientific method. They use careful observations or measurements to find facts. These results come from experiments that other people can repeat to see if they get the same answer. This makes scientific facts very reliable. People can also use reason or personal experience to check things. Some people look to authority or standard reference works to find the truth. In math, a fact is a statement called a theorem. A theorem is proven using logical arguments and specific rules called axioms.

People have been thinking about the meaning of "fact" for a long time. The word comes from the Latin word "factum." In the 1500s, it meant a thing that was done or performed. By the mid-16th century, people started using it to mean something that really occurred. In 1870, a thinker named Charles Sanders Peirce wrote about how people decide what to believe. He described four methods: tenacity, authority, a priori, and the scientific method. Later, in 1729, the word began to be used to describe an allegation that might or might not be true. This shows how our language changes over many years.

Philosophers study facts in branches called epistemology and ontology. Epistemology is the study of knowledge and truth. Ontology is the study of existence and reality. Some thinkers believe a fact is a "state of affairs." This means a fact is just a way that things are in the world. Others say a fact is what makes a sentence true. For example, the sentence "Jupiter is the largest planet" is true because of a real fact about Jupiter. There are even complex facts. The fact that Paris is the capital of France involves many smaller parts like the city, the country, and the government.

It is important to know the difference between facts and other ideas. Facts are different from theories, which are used to explain why facts happen. They are also different from values, which are ideas about what is good or bad. A philosopher named David Hume noted that you cannot always get a value from a fact. For instance, knowing people need food is a fact, but saying it is "good" to give food is a value. Historians also use facts to understand the past. Some say it is hard to be perfectly objective because people have biases. Historians try to have a fair conversation with the past by gathering as many facts as they can.

A fact is a true datum about a circumstance or an occurrence in the real world. It describes a state of affairs that is the case. Generally, facts are considered independent of belief, knowledge, or opinion. This means a fact remains true regardless of what a person thinks about it. For example, the statement "the Sun is a star" is an astronomical fact. A linguistic fact might be the observation that a specific sentence contains words. Facts are distinct from other concepts like inferences, theories, values, or objects. While a theory tries to explain why things happen, a fact is the actual occurrence itself.

To understand how facts function, we can look at their internal structure. Many thinkers believe that non-trivial true statements about reality are abstractions. These are composed of a complex of objects, properties, or relations. For instance, the statement "Paris is the capital city of France" describes a complex fact. This fact implies the existence of Paris and France. It also implies the existence of capital cities and governments. It further implies that the French government has the power to define its capital. It also implies that the government has chosen Paris. All these individual assertions must coincide to create the single fact.

There are different ways to categorize how we use the word "fact." In a legal or common sense, it can mean something that has really occurred. However, it can also be used to indicate an allegation. In this context, a "fact" might be something that may or may not be true. For example, someone might say an author's facts are not trustworthy. Another usage refers to findings derived through a process of evaluation. This is seen in terms like "fact-finding commissions." These groups use direct observation or the review of testimony to reach conclusions. These findings are distinguished from mere speculation or inference.

History and language show how our understanding of facts has evolved. The word derives from the Latin term "factum." In the 16th century, it originally meant a thing done or performed. By the mid-16th century, the meaning shifted to something that actually occurred. In 1870, Charles Sanders Peirce described four methods for deciding what to believe. These methods included tenacity, the method of authority, a priori, and the scientific method. In the field of history, scholars like E. H. Carr have noted the difficulty of objectivity. Carr argued that the biases involved in gathering facts make a perfectly objective history impossible. He suggested that history is a conversation between the present and the past.

In science, the definition of a fact is more specific and implies knowledge. A scientific fact is the result of repeatable, careful observation or measurement. This is often called empirical evidence. These facts are central to building scientific theories. Scientists distinguish between states of affairs in the external world and assertions of fact used in analysis. Some scholars argue that facts are "theory-laden." This means that knowing what to measure requires using other theories. For example, determining the age of fossils requires the theory of radioactive decay. This shows that the tools we use to find facts are often shaped by our existing scientific knowledge.

Philosophers study facts through specific branches of study. Epistemology is the branch concerned with knowledge and truth. Ontology is the branch that studies existence, being, and reality. One famous idea is the correspondence theory of truth. This theory suggests that a sentence is true because it corresponds to a fact. This idea assumes that an objective world exists. Another concept is the "is–ought" distinction made by David Hume. He argued that you cannot derive a value from a fact. For example, the fact that people need food does not logically prove the value that it is "good" to give it. This creates a clear boundary between factual statements and moral values.

Finally, facts can be contrasted with other logical concepts. One such concept is counterfactuality. A counterfactual is a statement about what might have occurred but did not. An example is saying that if a leader had lived, their empire would have been larger. This is different from an indicative conditional, which describes what is actually the case. In mathematics, the concept is also specialized. A mathematical fact is often called a theorem. A theorem is a statement that can be proven through logical argument. It relies on specific definitions and axioms to reach a certain conclusion.