{ localUrl: '../page/strong_Church_Turing_thesis.html', arbitalUrl: 'https://arbital.com/p/strong_Church_Turing_thesis', rawJsonUrl: '../raw/4ct.json', likeableId: '2697', likeableType: 'page', myLikeValue: '0', likeCount: '1', dislikeCount: '0', likeScore: '1', individualLikes: [ 'EricBruylant' ], pageId: 'strong_Church_Turing_thesis', edit: '9', editSummary: '', prevEdit: '8', currentEdit: '9', wasPublished: 'true', type: 'wiki', title: 'Strong Church Turing thesis', clickbait: 'A strengthening of the Church Turing thesis', textLength: '2285', alias: 'strong_Church_Turing_thesis', externalUrl: '', sortChildrenBy: 'likes', hasVote: 'false', voteType: '', votesAnonymous: 'false', editCreatorId: 'JaimeSevillaMolina', editCreatedAt: '2016-06-16 12:46:01', pageCreatorId: 'JaimeSevillaMolina', pageCreatedAt: '2016-06-15 13:40:46', seeDomainId: '0', editDomainId: 'AlexeiAndreev', submitToDomainId: '0', isAutosave: 'false', isSnapshot: 'false', isLiveEdit: 'true', isMinorEdit: 'false', indirectTeacher: 'false', todoCount: '9', isEditorComment: 'false', isApprovedComment: 'true', isResolved: 'false', snapshotText: '', anchorContext: '', anchorText: '', anchorOffset: '0', mergedInto: '', isDeleted: 'false', viewCount: '214', text: '> Every realistic model of computation is [ polynomial time reducible] to [ probabilistic Turing machines]\n\nWhich amounts to saying that every computable process in the universe can be efficiently simulated by a probabilistic Turing machine.\n\nThe definition of *realistic model* appeals to intuition rather than a precise definition of realistic. A rule of thumb is that a computation model is realistic if it could be used to accurately model some physical process. For example, there is a clear relation between the model of [ register machines] and the inner workings of personal computers. On the other hand, a computational model which can access an [ NP oracle] does not have a physical counterpart.\n\nAs it happened with the standard [4bw], this is an inductive rather than a mathematically defined statement. However, unlike the standard CT thesis, it is [ widely believed to be wrong], primarily because [ quantum computation] stands as a highly likely counterexample to the thesis.\n\nWe remark that non-deterministic computation is not a candidate counterexample to the strong CT thesis, since it is not realistic. That said, we can find a relation between the two concepts: if [4bd $P=NP$] and [ $BQP\\subset NP$] then $BQP = P$, so quantum computation can be efficiently simulated, and we lose the strongest contestant for a counterexample to Strong CT.\n\n#Consequences of falsehood\n\nThe falsehood of the Strong CT thesis opens up the possibility of the existence of physical processes that, while computable, cannot be modeled in a reasonable time with a classical computer. One consequence of this, that would also mean that if quantum computing is possible the speed .up it provides is non-trivial.\n\nEpistemic processes which assign priors using a penalty for computational time complexity are misguided if the Strong CT thesis is false. See for example [ Levin search].\n\n[todo: show when QM is covered?The failure of Strong CT raises the possibility for human minds in particular, and general intelligence in general being impossible to simulate without a quantum speedup, *if* it turns out that human minds take advantage of quantum phenomena. We suspect, however, that this is false.] [comment: probably not worth raising? human brains have crazy-low decoherence times.]', metaText: '', isTextLoaded: 'true', isSubscribedToDiscussion: 'false', isSubscribedToUser: 'false', isSubscribedAsMaintainer: 'false', discussionSubscriberCount: '2', maintainerCount: '2', userSubscriberCount: '0', lastVisit: '', hasDraft: 'false', votes: [], voteSummary: 'null', muVoteSummary: '0', voteScaling: '0', currentUserVote: '-2', voteCount: '0', lockedVoteType: '', maxEditEver: '0', redLinkCount: '0', lockedBy: '', lockedUntil: '', nextPageId: '', prevPageId: '', usedAsMastery: 'false', proposalEditNum: '0', permissions: { edit: { has: 'false', reason: 'You don't have domain permission to edit this page' }, proposeEdit: { has: 'true', reason: '' }, delete: { has: 'false', reason: 'You don't have domain permission to delete this page' }, comment: { has: 'false', reason: 'You can't comment in this domain because you are not a member' }, 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