Philosophy / 01

Reality before belief.

Ayn Rand 1905–1982

Objective reality · Reason

For Rand, reality exists independently of our wishes, fears and beliefs. Consciousness perceives what exists; it does not create existence. Her philosophy, Objectivism, treats reason as our means of identifying and integrating what we perceive.

Objectivity therefore asks us to connect our concepts and judgments to reality through observation and logic. A confident assertion cannot make itself true. We must examine the facts, keep the context in view and avoid contradictions in our reasoning.

This is a brief account of her epistemology, rather than a summary of her entire ethical or political philosophy. It does not imply that every other thinker on this page agrees with her.

Philosophy / 02

Begin with a question.

Socrates c. 469–399 BCE

Questioning · Intellectual humility

Socrates left no surviving writings. We encounter him through others, especially Plato. In Plato’s Apology, Socrates examines people who believe they possess wisdom and finds a gap between their confidence and what they can explain.

The Socratic approach asks a person to clarify a claim, define its terms and follow its implications. Questions can reveal tensions between beliefs that initially seemed consistent. Recognizing what we do not know creates room for a better inquiry.

This method concerns the examination of beliefs, particularly about how to live. It is not a modern laboratory procedure, and Plato’s portrayal should not be mistaken for a complete historical record of Socrates’s views on reality.

Philosophy / 03

Give reasoning a structure.

Aristotle 384–322 BCE

Being · Logic · Explanation

Aristotle investigates being, the kinds of things that exist and the principles by which we can understand them. In Metaphysics IV, he presents the principle of non-contradiction: the same attribute cannot both belong and not belong to the same subject at the same time and in the same respect.

The qualifications matter. Two statements can appear to conflict while referring to different times, contexts or meanings. Clarifying those differences is part of careful reasoning, rather than simply deciding that one statement must be wrong.

His work connects inquiry with explanation, definitions and logical relations. Logical consistency alone does not establish that a claim matches reality: we must also examine its premises. This lens highlights a part of his philosophy, not all of his account of nature or knowledge.

Philosophy / 04

Leave room to be wrong.

Karl Popper 1902–1994

Critical rationalism · Testing

Popper describes scientific knowledge as provisional. We propose explanations and expose them to criticism and demanding tests. For an empirical theory to be scientific, it must rule out possible observations: something conceivable must count against it.

Passing a test does not finally prove a theory. It can strengthen the case for retaining it provisionally, while further criticism remains possible. Observations themselves can be questioned, so practical testing involves judgment as well as logic.

Falsifiability is a criterion for empirical science, not a rule that makes every non-scientific idea meaningless. His approach encourages us to identify what would change our minds and resist protecting an explanation from every possible objection.