Title text:
Unstoppable force-carrying particles can't interact with immovable matter by definition.
Transcript:
[An arrow pointing to the right and a trapezoid are labeled as 'Unstoppable Force' and 'Immovable Object' respectively.]
[The arrow is shown as entering the trapezoid from the left and the part of it in said trapezoid is coloured gray.]
[The arrow is shown as leaving the trapezoid to the right and is coloured black.]
[Caption below the panel:] I don't see why people find this scenario to be tricky.
Source: https://xkcd.com/3084/
Facepalm Man i'm dumb, this is a great answer to that thought experiment.
Force is not a thing that moves. Force is what is applied to an object. In this "answer" whatever is shown and depicted as force is not force.
Then reverse the assumptions. Maybe it’s the immovable object that can’t be interacted with. Apply all the force you want and meet nothibg
If you applied the unstoppable force and the object of application did not move - then this force was not unstoppable
Was that unstoppable force unstoppable before the object? Was it unstoppable after the object? Did anything stop it?
Eh, it's just redefining the assumed meaning. "Intangible" does mean "unstoppable" in a way, but that's not really what's intended.