In so far as theories of mathematics speak about reality, they are not certain, and in so far as they are certain, they do not speak about reality.


Geometrie and Erfahrung (1921) pp. 3-4 link.springer.com as cited by Karl Popper, The Two Fundamental Problems of the Theory of Knowledge (2014) Tr. Andreas Pickel, Ed. Troels Eggers Hansen.

Albert Einstein Quotes

In so far as theories of mathematics speak about reality, they are not certain, and in so far as they are certain, they do not speak about reality.

In so far as theories of mathematics speak about reality, they are not certain, and in so far as they are certain, they do not speak about reality.

In so far as theories of mathematics speak about reality, they are not certain, and in so far as they are certain, they do not speak about reality.

In so far as theories of mathematics speak about reality, they are not certain, and in so far as they are certain, they do not speak about reality.