??
If your talking about philosophy/epistemology, here are some things to get you started:
the "brain in a vat" problem (or I guess you could also say the "Matrix" problem),
more generally, you could say "skepticism"
or how about
the "problem of the criterion" or how about authors/philosophers such as
Locke, Berkley, Hume ("empiricists"),
Descartes, Spinoza, Gottfried ("rationalists")
or how about "the Sophists" Do a wikipedia/ Google search for any of the above, starting with Epistemology, which is the branch of philosophy dealing with the nature/ limits of human knowledge.
Formal reality refers to the existence of something in thought or concept, while objective reality refers to the actual existence of something in the external world.
Philosophers ask fundamental questions about existence, such as: What does it mean to exist? What is the nature of reality? Do we have free will? Is there a purpose to life? These questions explore the essence of existence and our place in the universe.
The concept of ontologically parasitic beings challenges our understanding of existence and reality by suggesting that there are entities that rely on other beings for their own existence. This raises questions about the nature of reality and the interconnectedness of all things.
The study of basic questions of reality and human existence is known as philosophy. Philosophers seek to understand fundamental concepts such as truth, knowledge, existence, values, mind, and reason through critical thinking and rational inquiry. They explore these questions through various branches of philosophy such as metaphysics, epistemology, ethics, and logic.
Metaphysics is the branch of philosophy that inquires into the nature of ultimate reality, including the fundamental nature of existence, reality, and being. It explores questions about the nature of knowledge, existence, reality, causality, and identity.
Ontology is the term defined as the study of existence, being, or reality. It focuses on questions related to what exists and how things exist.
Some philosophical questions about life include: What is the meaning of life? Is there a purpose to our existence? Do we have free will or are our actions predetermined? What is the nature of reality?
Throughout history, philosophers and scientists have been intrigued by questions about existence, such as: What is the nature of reality? How did the universe come into being? Do we have free will or are our actions predetermined? Is there a purpose or meaning to life? These questions continue to spark debate and exploration in the quest to understand the nature of existence.
Pascal's vase is a thought experiment in philosophy, used to illustrate Descartes' theory of mind-body dualism. It involves a hypothetical vase that cannot be seen or detected in any way, raising questions about the nature of consciousness and reality. By contemplating the existence of an undetectable vase, the thought experiment challenges our perception of reality and the limitations of human knowledge.
The metaphysical concept deals with the nature of reality and existence beyond the physical world. It explores questions about the nature of being, reality, existence, and ultimate truth. It often delves into topics such as the mind-body relationship, free will, and the existence of God.
The idea that life is a dream and death is waking up to a different reality is a philosophical concept that has been explored by many thinkers. It suggests that our current existence may not be the ultimate reality, and that there could be something beyond what we can imagine. This idea raises questions about the nature of reality and the purpose of our existence.
Ontology is the branch of metaphysics that deals with the nature of being, existence, and reality. It explores questions such as what exists, what properties are essential to existence, and how things relate to each other.