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| This paradox is a form of the ], but that paradox is most often discussed in the context of God's omnipotence (''Can God create a stone so heavy that He cannot lift it?''). | This paradox is a form of the ], but that paradox is most often discussed in the context of God's omnipotence (''Can God create a stone so heavy that He cannot lift it?''). | ||
| The paradox should be understood as an exercise in logic, not as the postulation of a possible reality. According to modern scientific understanding, there are and indeed cannot be neither irresistible forces nor immovable objects. An immovable object would have to have infinite inertia and therefore infinite mass. Such an object would collapse under its own gravity and create a ]. An irresistible force would mean infinite energy, that is also an infinite equivalent mass. | |||
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Revision as of 15:32, 4 May 2005
The Irresistible force paradox is a classic paradox formulated as follows:
- What happens when an irresistible force meets an immovable object?
Common responses to this paradox resort to logic and semantics.
- Logic: if such a thing as an irresistible force exists, then no object is immovable, and viceversa. It is logically impossible to have these two entities (a force that cannot be resisted and an object that cannot be moved by any force) in the same universe.
- Semantics: if there is such a thing as an irresistible force, then the phrase immovable object is meaningless in that context, and viceversa, and the issue amounts to the same thing as asking, e. g., for a triangle that has four sides.
This paradox is a form of the omnipotence paradox, but that paradox is most often discussed in the context of God's omnipotence (Can God create a stone so heavy that He cannot lift it?).
The paradox should be understood as an exercise in logic, not as the postulation of a possible reality. According to modern scientific understanding, there are and indeed cannot be neither irresistible forces nor immovable objects. An immovable object would have to have infinite inertia and therefore infinite mass. Such an object would collapse under its own gravity and create a singularity. An irresistible force would mean infinite energy, that is also an infinite equivalent mass.
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