The Philosophy Now Forum

The ideas and writing on this topic are mine. I have worked with ChatGPT on these ideas. It helps polish my writing when I am expressing very complex ideas and refine my understanding of mathematics. The following content is the result of me being assisted by AI. It is work based on my ideas, rather than purely prompt-based AI-generated output, meaning someone asking AI to produce everything for them.

This topic concerns the Irresistible Force vs. Immovable Object Paradox

I developed a category-based interpretation of the irresistible force versus immovable object paradox. Both concepts ultimately depend upon the same underlying property (or category) of absolute invariance.

The apparent contradiction arises when two descriptions of the same invariant condition are treated as fundamentally distinct absolutes and categories.

The invariant condition can be expressed simply as:

T(S) = S

In the simplest terms this means:

T = the attempted change
S = the thing being tested
T(S) = S = the thing being tested does not change

Applied conceptually:

Immovable object:
Its position remains unchanged despite an attempted displacement.

Irresistible force:
Its capacity to overcome resistance remains unchanged despite an attempted resistance.

Therefore, both descriptions share the same underlying structural property:

Absolute invariance: the defining property remains unchanged under the relevant interaction.

The apparent paradox may therefore arise from treating two descriptions of the same invariant condition as fundamentally distinct absolutes, rather than recognising their shared underlying structure or category.

NB: This is a conceptual interpretation, not a claim that the equation itself constitutes a physical law or mathematical proof.

Huh?

It’s not a paradox. It’s just a mistake. A very silly mistake.

mickthinks wrote: ↑Tue Sep 22, 2026 9:14 pm Huh?

It’s not a paradox. It’s just a mistake. A very silly mistake.

It's there to be discussed and resolved, mate.

mickthinks wrote: ↑Tue Sep 22, 2026 9:14 pm Huh?

It’s not a paradox. It’s just a mistake. A very silly mistake.

I was lead to believe that it is the simplest thing in the world to note that a universe might contain such a thing as an immovable object, or perhaps an unstoppable force. Otherwise it must contain neither, because the faux paradox simply shows that it cannot contain both. As if that weren't entirely obvious.

I never realised it merited any more thought than that. Have we been lackadaisical? Perhaps we a need a top 10 list of reasons why nothing happens when an immovable object... etc... etc... &c.

Does this forum have rules about trolling? I tried to find the forum rules; however, I couldn't locate them.

Fanman wrote: ↑Thu Sep 24, 2026 11:17 am Does this forum have rules about trolling? I tried to find the forum rules; however, I couldn't locate them.

No.

The forum rules, such as they are and for what it is worth, are set down here

is the "unmovable" object on a planet?

when the "unmovable" object is out of sensory range of the observer, how is its "immovability" measured?

if the "unmovable" object isn't in the exact center of the "expanding" universe, it can't really be "unmovable" can it?

-Imp

mickthinks wrote: ↑Thu Sep 24, 2026 1:43 pm

Fanman wrote: ↑Thu Sep 24, 2026 11:17 am Does this forum have rules about trolling? I tried to find the forum rules; however, I couldn't locate them.

No.

The forum rules, such as they are and for what it is worth, are set down here

Thank you for that.

Impenitent,

is the "unmovable" object on a planet?

The paradox, as written, doesn't specify that.

when the "unmovable" object is out of sensory range of the observer, how is its "immovability" measured?

The paradox, as written, does not specify that.

if the "unmovable" object isn't in the exact center of the "expanding" universe, it can't really be "unmovable" can it?

That's a tricky question. Let me do some work on it with Microsoft Copilot, and I'll get back to you.

Impenitent,

if the "unmovable" object isn't in the exact center of the "expanding" universe, it can't really be "unmovable" can it?

After discussing your tricky question with Microsoft Copilot, I came to this conclusion. We are not discussing an actual force; we're discussing an absolute descriptor, which is a conceptual model. That makes it difficult to discuss within the laws of physics—essentially because it behaves in a way that operates outside of them. So, to answer your question, I would humbly say: It is problematic to the point where I cannot, within my capacity, find a way to include an immovable object within the established, rational laws of cosmology. I don't mind approaching the question conceptually, but it doesn't fit into a category we can integrate in actuality.

Fanman wrote: ↑Thu Sep 24, 2026 5:46 pm Impenitent,

if the "unmovable" object isn't in the exact center of the "expanding" universe, it can't really be "unmovable" can it?

After discussing your tricky question with Microsoft Copilot, I came to this conclusion. We are not discussing an actual force; we're discussing an absolute descriptor, which is a conceptual model. That makes it difficult to discuss within the laws of physics—essentially because it behaves in a way that operates outside of them. So, to answer your question, I would humbly say: It is problematic to the point where I cannot, within my capacity, find a way to include an immovable object within the established, rational laws of cosmology. I don't mind approaching the question conceptually, but it doesn't fit into a category we can integrate in actuality.

the gods must play table tennis using an immovable object propelled by irresistible forces from indestructible paddles... (but that also assumes friction and gravity...)

but that's metaphysics where anything may be described...

-Imp

This festival of slop masquerading as philosophical enquiry reminds me of that time when Advocate tried to overcome the No True Scotsman "problem" by proving that there is such a thing as a true Scotsman.

Impenitent wrote: ↑Thu Sep 24, 2026 11:28 pm

Fanman wrote: ↑Thu Sep 24, 2026 5:46 pm Impenitent,

if the "unmovable" object isn't in the exact center of the "expanding" universe, it can't really be "unmovable" can it?

After discussing your tricky question with Microsoft Copilot, I came to this conclusion. We are not discussing an actual force; we're discussing an absolute descriptor, which is a conceptual model. That makes it difficult to discuss within the laws of physics—essentially because it behaves in a way that operates outside of them. So, to answer your question, I would humbly say: It is problematic to the point where I cannot, within my capacity, find a way to include an immovable object within the established, rational laws of cosmology. I don't mind approaching the question conceptually, but it doesn't fit into a category we can integrate in actuality.

the gods must play table tennis using an immovable object propelled by irresistible forces from indestructible paddles... (but that also assumes friction and gravity...)

but that's metaphysics where anything may be described...

-Imp

If something purportedly paradoxical does not describe reality, it is problematic to reason as though it is describing something that can exist. Therefore, in the case of paradoxes, I think semantics and the described mechanics require the same level of consideration.

Does the paradox of irresistible force vs. immovable object apply to the relativistic world in which so many folks have lost their bearings, and marbles?

Walker wrote: ↑Sat Sep 26, 2026 10:36 am Does the paradox of irresistible force vs. immovable object apply to the relativistic world in which so many folks have lost their bearings, and marbles?

Based on current scientific understanding, I don't think the paradox can coherently be applied to any system of reality modelling and interpretation. As far as I can tell, it's a conceptual model, phrased in a way that, without close philosophical inspection, appears to be a paradox.

Update to my post: These days, I enjoy phrasing things axiomatically, as it provides a shorthand that is easy to grasp and epistemically tight. Thank you to the contributors to the thread; I think we've made progress, which is rare on philosophy forums. Based on where the discussion has led me, I would express the paradox as:

T(S) = S ≈ Conceptually coherent → Empirically unresolved

Update to my post: Thinking theoretically, if we accept that both irresistible force and immovable object share the same sustaining quality, absolute invariance, then they may be understood as coexisting in the same universe as different species of the same genus. In that sense, if they collide, neither can alter the other's defining property. The traditional paradox therefore appears to dissolve into a condition of mutual invariance.