Is every scientific theory based on facts?

Any scientific theory must be based on a careful and rational examination of the facts. Facts and theories are two different things. read more

Every tested scientific theory is based on facts. Theories that have not been tested yet are not. I am afraid Jon Sherman is wrong: theories are not “proven hypotheses”. Instead, both hypotheses and theories are statements about the physical universe. Hypotheses tend to be more specific statements; theories are more general statements. read more

Any scientific theory must be based on a careful and rational examination of the facts. Facts and theories are two different things. In the scientific method, there is a clear distinction between facts, which can be observed and/or measured, and theories, which are scientists' explanations and interpretations of the facts. read more

A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not"guesses" but reliable accounts of the real world. read more