#epistemology

The understanding can only think what it has already perceived through intuition.

From The Critique of Pure Reason by Immanuel Kant

Thoughts without content are empty, intuitions without concepts are blind.

From The Critique of Pure Reason by Immanuel Kant

Experience without theory is blind, but theory without experience is mere intellectual play.

From The Critique of Pure Reason by Immanuel Kant

There are various kinds of knowledge, and it is important to distinguish between them.

From The Problems of Philosophy by Bertrand Russell

Believing in something is not the same as knowing it.

From Rationality: From AI to Zombies by Eliezer Yudkowsky

Metaphysics is the science of the limits of human understanding.

From The Critique of Pure Reason by Immanuel Kant

The understanding does not derive its laws from, but imposes them upon, the objects of experience.

From The Critique of Pure Reason by Immanuel Kant

Axioms are not mere assumptions; they are necessary truths.

From The Critique of Pure Reason by Immanuel Kant

Synthetic judgments are those that add something to our knowledge.

From The Critique of Pure Reason by Immanuel Kant

Our knowledge can only be finite, while our ignorance must necessarily be infinite.

From The Logic of Scientific Discovery by Karl Popper

We must not confuse the descriptions of mental states with the states themselves.

From The Concept of Mind by Gilbert Ryle

Concepts without intuitions are empty, intuitions without concepts are blind.

From The Critique of Pure Reason by Immanuel Kant

The critique of pure reason is the only means to distinguish between true and false knowledge.

From The Critique of Pure Reason by Immanuel Kant

Experience is the only source of knowledge.

From The Critique of Pure Reason by Immanuel Kant

All our knowledge begins with experience, but it does not follow that it arises from experience.

From The Critique of Pure Reason by Immanuel Kant

The critique of pure reason must be a critique of the faculty of reason itself.

From The Critique of Pure Reason by Immanuel Kant

The principle of non-contradiction is the foundation of all logical reasoning.

From The Critique of Pure Reason by Immanuel Kant

The greatest challenge to philosophy is that it cannot prove its conclusions with certainty.

From The Problems of Philosophy by Bertrand Russell

The inability to predict the unpredictable is the essence of the problem.

From The Black Swan by Nassim Nicholas Taleb

The greatest problem of philosophy is that of the relation between knowledge and reality.

From The Problems of Philosophy by Bertrand Russell

Knowledge is a process of conjecture and criticism.

From The Beginning of Infinity by David Deutsch

The categories are nothing but functions of the understanding.

From The Critique of Pure Reason by Immanuel Kant