Hans Reichenbach

Common to the two geometries is only the general property of one-to-one correspondence, and the rule that this correspondence determines straight lines…

— Hans Reichenbach

Occasionally one speaks... of signals or signal chains. It should be noted that the word signal means the transmission of signs and…

— Hans Reichenbach

The essence of knowledge is generalization. That fire can be produced by rubbing wood in a certain way is a knowledge derived…

— Hans Reichenbach

We can... treat only the geometrical aspects of mathematics and shall be satisfied in having shown that there is no problem of…

— Hans Reichenbach

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

— Hans Reichenbach

We must... maintain that mathematical geometry is not a science of space insofar as we understand by space a visual structure that…

— Hans Reichenbach

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

— Hans Reichenbach

The philosopher of science is not much interested in the thought processes which lead to scientific discoveries; he looks for a logical…

— Hans Reichenbach

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

— Hans Reichenbach

The statement that although the past can be recorded, the future cannot, is translatable into the statistical statement: Isolated states of order…

— Hans Reichenbach

...the differential element of non-Euclidean spaces is Euclidean. This fact, however, is analogous to the relations between a straight line and a…

— Hans Reichenbach

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

— Hans Reichenbach

Absolute time would exist in a causal structure for which the concept indeterminate as to time order lends to a unique simultaneity,…

— Hans Reichenbach

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

— Hans Reichenbach

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

— Hans Reichenbach

The concept of congruence in Euclidean geometry is not exactly the same as that in non-Euclidean geometry. ..."Congruent" means in Euclidean geometry…

— Hans Reichenbach