I'm gonna give my views on each of these.
1. Solipsism – Only your own mind is sure to exist.
Why it's unfalsifiable: Any evidence you receive — from people, books, or even me — could just be a product of your own mind. — Truth Seeker
While true that our perception is a product of our mind rather than objective (in the sense of true representation of reality), I'd argue that when someone face a complexity they cannot comprehend and over time learn to comprehend, Solipsism suggests that the mind created a complexity it didn't itself understand yet and later did. A progression of understanding that doesn't merge well with reality being a product of our own mind as that would suggest it would know all things but arbitrarily limit that knowledge in ways that are illogical to the concept.
2. Idealism – Only minds (or mental states) exist; the material world is a construct.
Why it's unfalsifiable: All physical evidence could be interpreted as patterns of experience or ideas within consciousness.
Implication: Challenges the idea of objective reality; everything may be “mind-stuff.” — Truth Seeker
Similar to solipsism, but more about the metaphysics. Deterministic events that can be witnessed by many suggests that there's an objective reality outside of the mind. This hypothesis is only true for the self and becomes an ego-arrogant observation of reality. In a broader context it suggests that all minds must share the same reality construct and that all measurable data about ourselves and reality must stem from some overarching "thing" that produce the same mental states for all.
It's an hypothesis that doesn't follow burden of proof and has no evidence for its claims.
3. Simulation Theory – We’re living in an artificial simulation (e.g., a computer simulation).
Why it's unfalsifiable: Any feature of the simulation could be indistinguishable from “real” physical laws.
Implication: If advanced civilisations can run simulations, and they would, we might be one. — Truth Seeker
If we are in a simulation, it is so advanced it is essentially reality for us, meaning, what's the difference between reality and a "simulation"? Comparing it to the holographic theory in physics, in which we are projections in 3D from a 2D surface outside of reality, it basically functions the same; without the fundamentals of the holographic nature of our reality, our reality wouldn't function as our reality.
So it doesn't matter if it's a simulation or not, the fundamentals of our reality is what it is and changing them would mean we aren't what we are.
4. Philosophical Zombie Theory – Other beings look conscious but lack inner experience.
Why it's unfalsifiable: You can’t access others’ inner lives; their behaviour might be perfectly human but devoid of sentience.
Implication: Raises deep questions about empathy, moral consideration, and what we can ever know of others. — Truth Seeker
Problem of qualia. But at the same time follows the ego-arrogant perspective of the self being more important than other beings. The question becomes "why you?" Why would others not have qualia and inner experience? The logic of the concept relies on the arrogance of the idea; that somehow you are the center of reality and everyone else is "fake". I'd say it's a form of fallacy out of paranoia, in lack of better description. While the concept is somewhat sound, it faces a logical gap too large to function in actually reasonable terms. In the end it becomes more of a science fiction concept in which the premise comes before the problem, in which there's a reason for others to be p-zombies and then the issue of knowing this or not becomes a reality. The question still remains, why are you at the center of this question? And why did someone else feed this theory to you if they don't have any inner life?
In essence, how can the question be asked by someone who does not have the knowledge of an inner life? How would the p-zombie who proposed this concept be able to conceptualize the difference between something with and without inner-life without an understanding of it?
5. Panpsychism – Consciousness is a fundamental aspect of all matter.
Why it's unfalsifiable: You can’t measure the subjective experience of an atom or rock.
Implication: Consciousness is ubiquitous — a kind of mental “stuff” in everything, not just brains. — Truth Seeker
This is not really just an untestable hypothesis. It depends on how we measure consciousness. If it turns out that consciousness is able to be measured in different states of gradual evolution based on the complexity of the thing being measured, then it can actually be tested. It is also a proponent in some theories in neuroscience.
What is being said here isn't measurable consciousness, but qualia. We can measure mental states and conscious activity in animals and even bugs. But we do not yet know if the physical processes of all matter have measurable consciousness, or if it's simply a matter of it being so minuscule that it becomes unable to be measured. Though, scientific research in this area is ongoing, so there's no conclusion yet.
And what is the difference between "everything" and "brain"? It's an arbitrary distinction as the brain is fundamentally just a composition of matter. From an outside perspective, what's the difference? Other than a certain and very specific composition that may give rise to an increased effect of being precisely an emergent consciousness?
6. Pantheism – Everything is God.
Why it's unfalsifiable: It redefines “God” as synonymous with the totality of existence — making it a matter of interpretation, not evidence.
Implication: Spiritual or religious reverence directed toward the universe as a whole. — Truth Seeker
Burden of proof and circular reasoning. "God" is a conclusion that doesn't follow the premises. Everything could be high energy ice cream of higher dimensions with the same argument.
7. Panentheism – Everything is in God, but God is more than everything.
Why it's unfalsifiable: Like pantheism, it’s a metaphysical interpretation that isn’t testable. It adds transcendence beyond the universe.
Implication: Allows both immanence (God in all) and transcendence (God beyond all). — Truth Seeker
Again, burden of proof and circular reasoning. "God" is a conclusion that doesn't follow the premises. Everything could be high energy ice cream of higher dimensions with the same argument.
8. Dualism – Mind and matter are fundamentally distinct.
Famous proponent: René Descartes
Why it's untestable: No clear empirical way to prove the existence of an immaterial mind separate from the brain.
Implication: Suggests consciousness could exist after death. — Truth Seeker
The problem isn't that it's impossible to empirically test consciousness outside of matter (brain), but rather that there's no evidence for them being distinct in the first place. It's circular reasoning basically and there's enough scientific evidence that points in the other direction, underlying that there is not consciousness without matter (brainbody or computer for that matter).
9. Theism – A personal God created and oversees the universe.
Why it's untestable: Claims about God typically lie beyond the scope of scientific inquiry.
Implication: Provides a moral and existential framework for billions, but rests on faith or personal experience. — Truth Seeker
Again, burden of proof and circular reasoning. "God" is a conclusion that doesn't follow the premises. Everything could be high energy ice cream of higher dimensions with the same argument.
Faith is no ground for sound philosophy. It's why most religious philosophers struggled so much. A tremendously biased itch in their brain they had to shoehorn into their philosophies, fundamentally limiting their inquiries.
10. Deism – A non-interventionist creator started the universe but does not interfere.
Why it's untestable: The absence of divine interference is indistinguishable from naturalism.
Implication: God exists but doesn't respond to prayer or intervene in history. — Truth Seeker
If there's any hypothesis of a God that has some reasonable ground it's this. Since it can be fused together with the simulation theory; essentially, we are a petri dish universe, something kickstarted as a chemical reaction in their perspective. But as such, it doesn't matter, because it just becomes a question about interdimensional aliens rather than "God" in the sense humans view the concept.
Another way to interpret is similar to movies like Prometheus and 2001: A Space Odyssey. That some entity kick started life/consciousness, but they're not God, but another form of life/consciousness creating us, as we would create AI.
Still, it becomes a hypothesis that demands observation to even come close to validity. So far nothing in science supports this other than maybe panspermia, but even that doesn't have as much support as abiogenesis.
11. Nihilism – There is no inherent meaning, value, or purpose in the universe.
Why it's untestable: Meaning and value are subjective constructs.
Implication: Can lead to despair or radical freedom, depending on interpretation. — Truth Seeker
The more we learn about our reality, the more support this gets. There might still be a purpose beyond human understanding, but that also means beyond us and indifferent to us.
Despair comes before the realization that we are forced to produce our own meaning. When God dies, it's our responsibility to create meaning for ourselves and our existence. Nihilism is only the depression out of the realization there's no meaning, it isn't a constant for our existence. The ones who propose such lack imagination and curiosity to look further. They are no pioneers of humanity.
12. Eternalism (Block Universe Theory) – Past, present, and future all exist equally.
Why it's untestable: You cannot directly observe future events as already existing.
Implication: Time is an illusion; "now" is just a perspective. — Truth Seeker
There are many concepts of the Block Universe Theory, not all propose the future being in that block. It can also be that the future is composed of fundamental randomness of probability and that this probability collapse when interacting with the presence composed of known states of matter, which solidifies in a solid state past. That our perception of reality is fundamentally the experience of these quantum states collapsing.
There's a lot of support in physics for this and time as an illusion is kind of accepted already.
13. Multiverse Theory – There are countless parallel universes.
Why it's (currently) untestable: Other universes are, by definition, beyond our observable horizon.
Implication: Our universe may be just one of infinitely many, each with different laws or histories. — Truth Seeker
There are two version of this. One is a multiverse with formed bubble universes, almost like bubbles in carbonated water. Each bubble has its own progression that doesn't split (as in quantum physics concept of parallel universes), so our universe is based on specific laws of physics that produce the properties of our reality. We wouldn't even be able to enter other bubbles as reality works fundamentally different there and we wouldn't recognize or could even comprehend the perception of reality in that place. This means, we only have our own universe and reality, while there are infinite bubbles in higher dimensional realities.
The other version is the quantum physics interpretation (Everett). In which there are no quantum collapses and that everything exists in parallel universes. But what is missed is that the differences between them are basically the difference in one single collapse happening, and essentially produces such a large quantity of universes that it effectively needs to be counted as infinity. And most of them look identical as a quantum collapse in any part of the universe and reality would constitute a split. The idea of other universe "where we did other choices in life" is mostly fiction. While possible, the location is not a single thing, but closer to a gradient of infinites.
14. Reincarnation – Consciousness is reborn into new lives.
Why it's untestable: No conclusive way to track consciousness or memory between lives.
Implication: May promote ethical behaviour, depending on karmic beliefs. — Truth Seeker
Again, similar to arguments about God. Burden of proof and circular reasoning. The conclusion comes before any evidence or reasonable premises. Pure faith.
The only concept that comes close is that our matter returns to nature. In a sense we are formed and we consume matter that becomes us and then we are consumed back into nature. Like a bright point existing and then fading away. But nothing of this suggests consciousness does the same as it would need to first prove the Dualist concept and then needs to prove this state of consciousness moves deliberately.
That said, we don't yet know if we could copy our consciousness into something like a computer system. We wouldn't be able to "move" into it, but copying the brain composition and simulating everything in such detail that the mind functions in the exact same way would essentially be something like it. But then it becomes something else and isn't a fundamental part of what constitutes reincarnation.
And since most actual evidence speaks against dualism, there's little in support of consciousness being able to operate within the matter construct of another form of brain. The brain composition and the specific consciousness it produce seems fundamentally inseparable.
15. Absolute Idealism – The universe is the expression of a single universal mind.
Why it's untestable: The "absolute" mind cannot be externally observed.
Implication: All existence is interconnected as part of a single consciousness. — Truth Seeker
Similar to arguments for God and simulation theory. Conclusion before the premise as well as why would it matter? The effect on our reality would be the same regardless and the purpose of this single mind would be indistinguishable from questions about what existed before the big bang.
16. Nondualism (Advaita Vedanta, Zen, etc.) – There is no fundamental separation between self and universe.
Why it's untestable: It’s a shift in consciousness rather than a theory with predictive power.
Implication: Suffering arises from the illusion of separation; enlightenment dissolves this illusion. — Truth Seeker
Removing the religious components, nonduality holds ground in the sense that humans have an arrogance in how we view our existence in the universe and reality. Similar to the geocentrism, we place ourselves at the center of the universe and then think of existence as us in relation to it, when both logic and science says that we are part of the same universe as everything else and it's fundamental for the purpose of fully understanding reality and the universe.
The problem with Adaita, Vedanta, Zen is that the religious bits are invented out of the concept and generally becomes something other than the pure scientific perspective.
17. Cosmic Solipsism – The entire cosmos exists for one observer (e.g., you).
Why it's untestable: Similar to solipsism but extended to cosmic scale. — Truth Seeker
Fundamentally the arrogance of humans, the geocentrism fallacy, a concept out of the ego rather than rational reasoning. Faith not in God, but in the self as being the most important thing in the universe... yet we see examples of this arrogance a lot in society
:sweat:
Empiricism says reality is what can be observed and tested.
Rationalism says reality is what can be logically deduced.
Phenomenology says reality is what appears in conscious experience.
Pragmatism says reality is what works — what lets you survive and make decisions. — Truth Seeker
Why not all combined? Each hold some merit in some form or another, they're not mutually exclusive.
I think most problems in philosophy around the subject of reality, perception and consciousness stem from the biases people have towards a certain school of thought they learned, rather than finding a holistic perspective that finds the merit in different thoughts.
For instance, reality can be logically deduced, then observed and tested and yet still be within the limited perception of experience we have.
People are too influenced by their biases, getting stuck in the mud of emotional attachment to some faith they have of a specific concept, losing the ability to reach into higher forms of understanding.
Essentially, most people just argue for their side like all of this was about their favourite sports team. It's why I think most people fail at philosophy. They argue for a belief, not what follows the rational, the logic, the evidence and so on.