Philosophy is "thinking about thinking." It clarifies our thought process and refines the basic concepts that we use to understand reality. Like other sciences, it works on problems – it is driven by questions that cannot be answered easily, or that are empirically undecidable. If these questions, like the mind-body problem, cannot be answered (yet?), one may still be able to build a theory that illuminates the problem itself. Philosophy has a system-building function, and it moves between explanation and understanding. Philosophy often discusses questions that later become fields of scientific inquiry; it is not only a search for causes, but also for ultimate meaning.

I have compiled a short list of what I consider to be some of the harder philosophical problems – not just plays with definitions, or questions about imaginary concepts, such as whether God exists.

Typical Philosophical Problems:

  • Thinking and reality: what is the relationship?

  • The mind-body problem, or: what is consciousness in relation to physical reality?

  • The nature of mathematical objects: What are numbers, geometrical objects, sets?

  • Demarcation problem: how can we distinguish between empirical sciences and mathematics, logic, or metaphysics?

  • Is there an actual infinity?

  • What are values?

  • Signs and objects: what enables the signifying relationship?

  • What is a thing? What is self-identity? How does something or someone stay itself throughout change? Why Am I still the same person after 10 years of life?

  • What is change? The relationship between actuality, potentiality, possibility, necessity, or impossibility?