Philosophical theories are theories that are philosophical, rather than purely scientific by nature. Meanwhile, philosophical concepts can be loosely describes as ideas or “concepts” that are philosophical in nature.

Generally, a concept is a single idea, a theory is an explanation of how something works, and philosophy is simply the study of that which we can’t know for sure (see the branches of philosophy.).

So then, for our purposes, philosophical theories and concepts is simply a broad category that contains all non-scientific theories worth discussing.

TIP: For a great explainer on the basics of Philosophy see Tamar Gendler: An Introduction to the Philosophy of Politics and Economics by Big Think.

NOTE: Some scientific theories that spark metaphysical philosophical questions are categorized here (as well as under their respective scientific fields). Learn more about scientific theories.

Intention Matters


Intention matters in planning, action, and doing. Attention, intention, and impact are all important components of an action.

We Might Be in a Virtual Simulation


The simulation argument can be summarized as the idea that reality might be a virtual simulation (we might be “in the Matrix” / “in a video game”).

Human Behavior can be Random


Human behavior can be random to some extent, but most behavior is based on prior input, and thus is “deterministic” (meaning not totally random).

There is Cake!


Let them eat cake

It is said that, “there is no cake”, that, “the cake is a lie”, but this isn’t true. The cake you were promised may be a lie, but there is cake.

Everything That’s True Can Be Proven


Everything is either true or not true, but not everything that is true can be proven true, and not everything false can be proven false.