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⚫ {{short description|What happens when an irresistible force meets an immovable object?}}
The '''Irresistible force paradox''' is a classic ] formulated as follows:
{{redirect|Unstoppable force|the album|Unstoppable Force{{!}}''Unstoppable Force''}}
{{More citations needed|date=February 2010}}


The '''irresistible force paradox''' (also '''unstoppable force paradox''' or '''shield and spear paradox'''), is a classic ] formulated as "What happens when an unstoppable force meets an immovable object?" The immovable object and the unstoppable force are both implicitly assumed to be indestructible, or else the question would have a trivial resolution. Furthermore, it is assumed that they are two entities.
⚫ :''What happens when an irresistible force meets an immovable object?''


The paradox arises because it rests on two incompatible premises—that there can exist simultaneously such things as ''unstoppable forces'' and ''immovable objects''.<ref name=NFLS>
Common responses to this paradox resort to logic and semantics.
{{cite journal|author=Mike Alder |year=2004 |title=Newton's Flaming Laser Sword |url=http://www.philosophynow.org/issues/46/Newtons_Flaming_Laser_Sword |journal=] |volume=46 |pages=29–33 }}
: Also available as {{cite web|author=Mike Alder |year=2004 |title=Newton's Flaming Laser Sword |url=http://school.maths.uwa.edu.au/~mike/Newtons%20Flaming%20Laser%20Sword.pdf |publisher=] |work=Mike Alder's Home Page |url-status=dead |archive-url=https://web.archive.org/web/20111114041242/http://school.maths.uwa.edu.au/~mike/Newtons%20Flaming%20Laser%20Sword.pdf |archive-date=November 14, 2011 }}</ref>


== Origins ==
*'''Logic:''' if such a thing as an irresistible force exists, then no object is immovable, and vice versa. 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.
⚫ An example of this paradox in eastern thought can be found in the origin of the Chinese word for ] ({{zh|c=矛盾|p=máodùn|l=spear-shield}}). This term originates from a story (see {{slink|Kanbun|Example}}) in the 3rd century BC philosophical book '']''.<ref>''Han Feizi'' (韓非子), chapter 36, ''Nanyi'' (難一 "Collection of Difficulties, No. 1")'.</ref> In the story, a man trying to sell a spear and a shield claimed that his spear could pierce any shield, and then claimed that his shield was unpierceable. Then, asked about what would happen if he were to take his spear to strike his shield, the seller could not answer. This led to the idiom of "''zìxīang máodùn''" (自相矛盾, "from each-other spear shield"), or "self-contradictory".


Another ancient and mythological example illustrating this theme can be found in the story of the ], which can never be caught, and the hound ], which never misses what it hunts. Realizing the ], ], Lord of the Sky, turns both creatures into static constellations.<ref>{{cite book |url = https://books.google.com/books?id=yMbzhPrIkt4C&pg=PA275 |title = Nature Guide Stars and Planets |page = 275 |author = DK Publishing |publisher = Penguin |year = 2012 |isbn = 978-1-4654-0353-7}}</ref>
*'''Semantics:''' if there is such a thing as an irresistible force, then the phrase ''immovable object'' is meaningless in that context, and vice versa, and the issue amounts to the same thing as asking, ''e.g.,'' for a triangle that has four sides.


== Applications ==
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 problems associated with this paradox can be applied to any other conflict between two abstractly defined extremes that are opposite.


One of the answers generated by seeming paradoxes like these is that there is no contradiction – that there is not a ]. Christopher Kaczor suggested that the need to change indicates a lack of power rather than the possession thereof, and as such a person who was omniscient would never need to change their mind – not changing the future would be consistent with omniscience rather than contradicting it.<ref>Kaczor, Christopher (2009). ''This Rock'', 20(3).</ref>
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 not and indeed cannot be either irresistible forces or immovable objects. An immovable object would have to have infinite ] and therefore infinite mass. Such an object would collapse under its own ] and create a ]. An irresistible force would imply an infinite energy, which by ]'s equation ''E = mc<sup>2</sup>'' is equivalent to an infinite mass. Note that, in the modern view, a cannonball which cannot be deflected and a wall which cannot be knocked down are both types of the same (impossible) object: an object with infinite inertia.


==Cultural references==
⚫ An example of this paradox in non-western thought can be found in the origin of the Chinese word for paradox (矛盾), literally "spear shield." This word originates from a story where a seller was trying to sell a spear and shield. When asked how good his spear was, he said that his spear could pierce any shield. Then, when asked how good his shield was, he said that it could defend all spear attacks. Then one person asked him what would happen if he were to take his spear to strike his shield. He could not answer, and this led to the idiom of 自相矛盾, or "self-contradictory".
* In the ] '']'' by ], ] is posed this question by the Ultra-Sphinx. His response to the paradox is "They surrender."
*In the original '']'' television series from 1982, '']'' brings up the irresistible force paradox when Michael asks him how they could defeat '']'', who is built the same as '']''. This is in the ninth episode of season 1, named "Trust Doesn't Rust", first aired November 19, 1982.
* In ]'s novel, '']'', a solution to the paradox is given.<ref name="Banks">{{cite book |last1=Banks |first1=Iain |title=Walking on Glass |date=1985 |publisher=] |isbn=9780748109968}}</ref>{{secondary source needed|date=October 2024}}
* The 2005 video game '']'' retells the story of the spear and shield from ''Han Feizi'' during its fifth case. A "King of Prosecutors" trophy that homages the story, depicting a cracked shield and a broken halberd, becomes an important piece of evidence during the case's events.<ref>{{cite video game|title=]|trans-title=]|developer=]|date=2005-09-15|platform=]|level=Rise from the Ashes}}</ref>
*In the ] game '']'', the champion Xin Zhao wields a spear and has the line "Find me an immovable object, and I'll put this question to rest." His ultimate move, Crescent Guard, creates a circle around him and makes him impervious to damage dealt by champions outside that circle, implying he is an unstoppable force.<ref name="Xin Zhao">{{cite web |title=THE SENESCHAL OF DEMACIA XIN ZHAO |url=https://na.leagueoflegends.com/en-us/champions/xin-zhao/ |website=League of Legends |publisher=Riot Games |access-date=11 April 2021 |ref=5}}</ref>
* In '']'', Zacian and Zamazenta, the games' mascot legendary Pokémon, are hinted to be an unstoppable sword and impenetrable shield. The two have the same total base stats, one having a higher attack stat and the other having a better defense stat, but due to their different typing, Zacian (the sword) has better resistances, making it better defensively as well.
* In '']'', during the event where the ] and the Spear Hero had a duel for the first time, the both of them make a few comments on "the tale about the all-penetrating Spear and the unbreakable Shield".
* The ] was described by online news outlets and commentators as "an example of an unstoppable force taking on an immovable object".<ref>{{Cite web |title=SEVILLA 1-1 ROMA AET (4-1 ON PENS): SPANISH SIDE CLAIM RECORD SEVENTH EUROPA LEAGUE CROWN AFTER SHOOTOUT WIN OVER ROMA |url=https://www.eurosport.com/football/europa-league/2022-2023/sevilla-v-roma-europa-league-final-live_sto9629367/story.shtml |access-date=2023-06-01 |website=www.eurosport.com}}</ref> Prior to the match, ], nicknamed "King of the Europa League",<ref>{{Cite web |last=Grez |first=Matias |date=2023-05-31 |title=Europa League final: Jose Mourinho goes in search of sixth European trophy 20 years after his first triumph |url=https://www.cnn.com/2023/05/31/football/jose-mourinho-roma-sevilla-europa-league-final-spt-intl/index.html |access-date=2023-06-01 |website=CNN |language=en}}</ref> had won the competition 6 times out of 6 finals, twice the amount of any other club. On the other side, ] (managing ]) had never lost a European final, and the team had won the ] the year prior. Both teams scored one goal in an exceptionally long game, lasting 150 minutes with added time, and were only separated through penalties, where Sevilla scored 4 and Roma 1.<ref>{{Cite web |title=Sevilla vs Roma: Europa League final - When the immovable object meets the irresistible force |url=https://www.skysports.com/amp/football/news/11095/12893162/sevilla-vs-roma-europa-league-final-when-the-immovable-object-meets-the-irresistible-force |access-date=2023-06-01 |website=Sky Sports |language=en}}</ref>


==Pop culture== ==See also==
* ]
The irresistible force paradox has infiltrated ]. A reference to the irresistible force paradox has been made in a ] episode (Trust doesn't Rust) where the paradox is wrongly attributed to ] and its meaning is intentionally distorted.
* ]
*]


==References==
This paradox was also popularized in the 1980s with reference to ] nemeses ] (the irresistible force) and ] (the immovable object).
{{Reflist}}

{{DEFAULTSORT:Irresistible Force Paradox}}
] ]
]

]
It also appears in the novel ] by ], where the solution is: "the immovable object moves; the unstoppable object stops."

The paradox has also been applied in the Marvel Universe of comics, whenever a battle between the ] (immovable object) and the Juggernaut (irresistable force) occurs.

There is a reference to the paradox in ]. When a player gets exalted reputation with the Alterac Valley battleground, among the rewards are The Unstoppable Force (a two-handed ]) and The Immovable Object (a ]). While they are specifically made for ] combat, they have no special properties contradicting each other, so the paradox itself is not addressed in-game.

Latest revision as of 01:04, 9 December 2024

What happens when an irresistible force meets an immovable object? "Unstoppable force" redirects here. For the album, see Unstoppable Force.
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The irresistible force paradox (also unstoppable force paradox or shield and spear paradox), is a classic paradox formulated as "What happens when an unstoppable force meets an immovable object?" The immovable object and the unstoppable force are both implicitly assumed to be indestructible, or else the question would have a trivial resolution. Furthermore, it is assumed that they are two entities.

The paradox arises because it rests on two incompatible premises—that there can exist simultaneously such things as unstoppable forces and immovable objects.

Origins

An example of this paradox in eastern thought can be found in the origin of the Chinese word for contradiction (Chinese: 矛盾; pinyin: máodùn; lit. 'spear-shield'). This term originates from a story (see Kanbun § Example) in the 3rd century BC philosophical book Han Feizi. In the story, a man trying to sell a spear and a shield claimed that his spear could pierce any shield, and then claimed that his shield was unpierceable. Then, asked about what would happen if he were to take his spear to strike his shield, the seller could not answer. This led to the idiom of "zìxīang máodùn" (自相矛盾, "from each-other spear shield"), or "self-contradictory".

Another ancient and mythological example illustrating this theme can be found in the story of the Teumessian fox, which can never be caught, and the hound Laelaps, which never misses what it hunts. Realizing the paradox, Zeus, Lord of the Sky, turns both creatures into static constellations.

Applications

The problems associated with this paradox can be applied to any other conflict between two abstractly defined extremes that are opposite.

One of the answers generated by seeming paradoxes like these is that there is no contradiction – that there is not a false dilemma. Christopher Kaczor suggested that the need to change indicates a lack of power rather than the possession thereof, and as such a person who was omniscient would never need to change their mind – not changing the future would be consistent with omniscience rather than contradicting it.

Cultural references

  • In the graphic novel All-Star Superman by Grant Morrison, Superman is posed this question by the Ultra-Sphinx. His response to the paradox is "They surrender."
  • In the original Knight Rider television series from 1982, KITT brings up the irresistible force paradox when Michael asks him how they could defeat K.A.R.R., who is built the same as KITT. This is in the ninth episode of season 1, named "Trust Doesn't Rust", first aired November 19, 1982.
  • In Iain Banks's novel, Walking on Glass, a solution to the paradox is given.
  • The 2005 video game Phoenix Wright: Ace Attorney retells the story of the spear and shield from Han Feizi during its fifth case. A "King of Prosecutors" trophy that homages the story, depicting a cracked shield and a broken halberd, becomes an important piece of evidence during the case's events.
  • In the MOBA game League of Legends, the champion Xin Zhao wields a spear and has the line "Find me an immovable object, and I'll put this question to rest." His ultimate move, Crescent Guard, creates a circle around him and makes him impervious to damage dealt by champions outside that circle, implying he is an unstoppable force.
  • In Pokémon Sword and Shield, Zacian and Zamazenta, the games' mascot legendary Pokémon, are hinted to be an unstoppable sword and impenetrable shield. The two have the same total base stats, one having a higher attack stat and the other having a better defense stat, but due to their different typing, Zacian (the sword) has better resistances, making it better defensively as well.
  • In The Rising of the Shield Hero, during the event where the Shield Hero and the Spear Hero had a duel for the first time, the both of them make a few comments on "the tale about the all-penetrating Spear and the unbreakable Shield".
  • The 2023 UEFA Europa League Final was described by online news outlets and commentators as "an example of an unstoppable force taking on an immovable object". Prior to the match, Sevilla FC, nicknamed "King of the Europa League", had won the competition 6 times out of 6 finals, twice the amount of any other club. On the other side, José Mourinho (managing AS Roma) had never lost a European final, and the team had won the Conference League the year prior. Both teams scored one goal in an exceptionally long game, lasting 150 minutes with added time, and were only separated through penalties, where Sevilla scored 4 and Roma 1.

See also

References

  1. Mike Alder (2004). "Newton's Flaming Laser Sword". Philosophy Now. 46: 29–33.
    Also available as Mike Alder (2004). "Newton's Flaming Laser Sword" (PDF). Mike Alder's Home Page. University of Western Australia. Archived from the original (PDF) on November 14, 2011.
  2. Han Feizi (韓非子), chapter 36, Nanyi (難一 "Collection of Difficulties, No. 1")'.
  3. DK Publishing (2012). Nature Guide Stars and Planets. Penguin. p. 275. ISBN 978-1-4654-0353-7.
  4. Kaczor, Christopher (2009). This Rock, 20(3).
  5. Banks, Iain (1985). Walking on Glass. Hachette Digital. ISBN 9780748109968.
  6. Capcom (2005-09-15). Gyakuten Saiban 1 [Phoenix Wright: Ace Attorney] (Nintendo DS). Level/area: Rise from the Ashes.
  7. "THE SENESCHAL OF DEMACIA XIN ZHAO". League of Legends. Riot Games. Retrieved 11 April 2021.
  8. "SEVILLA 1-1 ROMA AET (4-1 ON PENS): SPANISH SIDE CLAIM RECORD SEVENTH EUROPA LEAGUE CROWN AFTER SHOOTOUT WIN OVER ROMA". www.eurosport.com. Retrieved 2023-06-01.
  9. Grez, Matias (2023-05-31). "Europa League final: Jose Mourinho goes in search of sixth European trophy 20 years after his first triumph". CNN. Retrieved 2023-06-01.
  10. "Sevilla vs Roma: Europa League final - When the immovable object meets the irresistible force". Sky Sports. Retrieved 2023-06-01.
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