Biology Quote by Pierre Teilhard de Chardin

Is evolution a theory, a system, or a hypothesis? It is much more it is a general postulate to which all theories, all hypotheses,…

— Pierre Teilhard de Chardin

Evolution is an organizing principle and when we call it a theory, we mean it's a theory, we don't mean that it's a belief…

— Alan I. Leshner

Evolution is a theory in a special philosophical sense of science, but in terms of ordinary laymen's use of language, it's a fact, ..…

— Richard Dawkins

Evolution is not a fact. Evolution doesn't even qualify as a theory or as a hypothesis. It is a metaphysical research program, and it…

— Karl Popper

A theory is just a mathematical model to describe the observations.

— Karl Popper

Think of a hypothesis as a card. A theory is a house made of hypotheses.

— Marilyn vos Savant

“(Evolution) general condition to which all theories, all hypotheses, all systems must bow and which they must satisfy henceforward if they are to be…

— Pierre Teilhard de Chardin

Evolution is a fact. It is the best explanation of what is known from observations. It's a theory as powerful as the theory of…

— Donald Johanson

The theory of evolution, like the theory of gravity, is a scientific fact.

— Neil deGrasse Tyson

The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species…

— David Deutsch

Evolution is far more than a belief or an educated guess about how people came to be as they are. It is, in fact,…

— Alan I. Leshner

I think it's a theory, the theory of evolution and I don't accept it as a theory.

— Ron Paul