首页
登录
职称英语
Assuming that the engineering problems could be overcome, the production of
Assuming that the engineering problems could be overcome, the production of
游客
2025-02-01
41
管理
问题
Assuming that the engineering problems could be overcome, the production of a time machine could open up a Pandora’s box of causal paradoxes. Consider, for example, the time traveler who visits the past and murders his mother when she was a young girl. How do we make sense of this? If the girl dies, she cannot become the time traveler’s mother. But if the time traveler was never born, he could not go back and murder his mother.
Paradoxes of this kind arise when the time traveler tries to change the past, which is obviously impossible. But that does not prevent someone from being a part of the past.
Suppose the time traveler goes back and rescues a young girl from murder, and this girls grows up to become his mother. The causal loop is now self-consistent and no longer paradoxical. Causal consistency might impose restrictions on what a time traveler is able to do, but it does not rule out time travel per second.
Even if time travel isn’t strictly paradoxical, it is certainly weird. Consider the time traveler who leaps ahead a year and reads about a new mathematical theorem in a future edition of Scientific American. He notes the details, returns to his own time and teaches the theorem to a student, who then writes it up for Scientific American. The article is, of course, the very one that the time traveler reads. The question then arises: Where did the information about the theorem come from? Not from the time traveler, because he read it, but not from the student either, who learned it from the time traveler. The information seemingly came into existence from nowhere, reasonlessly.
The bizarre consequences of time travel have led some scientists to reject the notion outright. Stephen W. Hawking of the University of Cambridge has proposed a "Chronology protection conjecture," which would outlaw causal loops. Because the theory of relativity is known to permit causal loops, chronology protection would require some other factors to intercede to prevent travel into the past. What might this factor be? One suggestion is that quantum processes will come to the rescue. The existence of a time machine would allow particles to loop into their own past. Calculations hint that the ensuring disturbance would become self-reinforcing, creating a runaway surge of energy that would wreck the wormhole. [br] The information about the new mathematical theorem seems unreasonable in that ______.
选项
A、it is given by the time traveler
B、it is written by the traveler’s student
C、it still needs evidence t prove
D、it seems that there is no source of the information
答案
D
解析
细节题型见第三段中的例子及最后一句:这个信息似乎不合理,也就无法成立。因此D为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3938032.html
相关试题推荐
Assumingthattheengineeringproblemscouldbeovercome,theproductionof
Assumingthattheengineeringproblemscouldbeovercome,theproductionof
Assumingthattheengineeringproblemscouldbeovercome,theproductionof
Assumingthattheengineeringproblemscouldbeovercome,theproductionof
Hisemotionalproblems______fromhisexperiencesasachild,Ithink.A、stemB、fl
Nuclearpower,withallitsinherentproblems,isstilltheonlyoptiontoguara
Hisproductiontechniquesareelaborateandnearlegendary,buteveniftheycou
WhentheErieCanalwasbuiltinthe1820’s,itwastheengineeringmarvelofit
Hisemotionalproblems______fromhisexperiencesasachild,Ithink.A、stemB、fl
WhentheErieCanalwasbuiltinthe1820s,itwastheengineeringmarvelofits
随机试题
ThemostimportantthingnowisforDemocratsnottopanic.Despitewhatyour
Thehomeisthecentralfocusofmostyoungpeople’slivesinBritain,parti
[originaltext]M:Ididn’tseeyouincreativewritingclasstoday.Whathappene
下列对个人管理账户类型的期货基金描述正确的是()。A、开立个人管理期货账户这种形式只能被有较高收入的投资人所使用,因为CTA通常都会设置一个非常高的最
Ascomputingpowerhasgrown,ithasbeco
以下不是获得良好的金瓷结合界面润湿性方法的是A.金属表面清洁 B.金属表面光滑
下列各项中属于市场法使用的注意事项有( )。A.总价计量方式的适用性问题 B
患者女性,29岁。孕33周,突然阴道流血如经量,无腹痛,此时,需诊断是否前置胎盘
2019年6月,全国发行地方政府债券8996亿元,同比增长68.37%,环比增长
某股份制商业银行2010年末资产余额9341亿元,贷款余额5657亿元,资本净额
最新回复
(
0
)