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Hans Reichenbach Biography

Hans Reichenbach

Hans Reichenbach (September 26, 1891 – April 9, 1953) was a leading philosopher of science, educator, and proponent of logical empiricism. He was influential in the areas of science, education, and of logical empiricism. He founded the Gesellschaft für empirische Philosophie (Society for Empirical Philosophy) in Berlin in 1928, also known as the “Berlin Circle.” Carl Gustav Hempel, Richard von Mises, David Hilbert and Kurt Grelling all became members of the Berlin Circle. He authored The Rise of Scientific Philosophy. In 1930, Reichenbach and Rudolf Carnap became editors of the journal Erkenntnis (Knowledge). He also made lasting contributions to the study of empiricism based on a theory of probability; the logic and the philosophy of mathematics; space, time, and relativity theory; analysis of probabilistic reasoning; and quantum mechanics.

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Hans Reichenbach Quotes

. . . the differential element of non-Euclidean spaces is Euclidean. This fact, however, is analogous to the relations between a straight line and a curve, and cannot lead to an epistemological priority of Euclidean geometry, in contrast to the views of certain authors.

Certain, Curves, Element, Space, Views

The essence of knowledge is generalization. That fire can be produced by rubbing wood in a certain way is a knowledge derived by generalization from individual experiences; the statement means that rubbing wood in this way will always produce fire. The art of discovery is therefore the art of correct generalization. . . . The separation of relevant from irrelevant factors is the beginning of knowledge.

Art, Knowledge, Mean, Generalization, Produce

Absolute time would exist in a causal structure for which the concept indeterminate as to time order lends to a unique simultaneity, i. e. , for which there is no finite interval of time between the departure and return of a first-signal.

Unique, Order, Departure, Time, Simultaneity

Occasionally one speaks. . . of signals or signal chains. It should be noted that the word signal means the transmission of signs and hence concerns the very principle of causal order.

Causal, Mean, Occasionally, Order, Principles, Signs

Common to the two geometries is only the general property of one-to-one correspondence, and the rule that this correspondence determines straight lines as shortest lines as well as their relations of intersection.

Two, Lines, Common, Correspondence, Straight

. . . the mathematician uses an indirect definition of congruence, making use of the fact that the axiom of parallels together with an additional condition can replace the definition of congruence.

Condition, Definitions, Making, Together, Use

The philosopher of science is not much interested in the thought processes which lead to scientific discoveries; he looks for a logical analysis of the completed theory, including the establishing its validity. That is, he is not interested in the context of discovery, but in the context of justification.

Philosophy, Science, Discovery, Scientific

You see, there is no more purpose or meaning in the world than you put into it.

Purpose, World, Meaning, See

The concept of congruence in Euclidean geometry is not exactly the same as that in non-Euclidean geometry. . . . Congruent means in Euclidean geometry the same as determining parallelism, a meaning which it does not have in non-Euclidean geometry.

Congruence, Determining, Doe, Exactly, Mean, Same

Visual forms are not perceived differently from colors or brightness. They are sense qualities, and the visual character of geometry consists in these sense qualities.

Character, Color, Quality, Consists, Geometry, Qualities

We must. . . maintain that mathematical geometry is not a science of space insofar as we understand by space a visual structure that can be filled with objects - it is a pure theory of manifolds.

Mathematical, Pure, Space, Structure, Theory, Understand

If error is corrected whenever it is recognized as such, the path of error is the path of truth.

Life, Motivational, Truth, Whenever, Error, Recognized

We can. . . treat only the geometrical aspects of mathematics and shall be satisfied in having shown that there is no problem of the truth of geometrical axioms and that no special geometrical visualization exists in mathematics.

Exists, Geometrical, Mathematics, Problem, Shown, Special

Philosophy is regarded by many as inseparable from speculation. . . . Philosophy has proceeded from speculation to science.

Philosophy, Philosophical, Science, Proceeded, Speculation

It appears that the solution of the problem of time and space is reserved to philosophers who, like Leibniz, are mathematicians, or to mathematicians who, like Einstein, are philosophers.

Science, Space, Philosopher, Mathematicians, Philosophers, Like

The statement that although the past can be recorded, the future cannot, is translatable into the statistical statement: Isolated states of order are always postinteraction states, never preinteraction states.

Science, Past, Order, Isolated, Statement, Recorded