哲学问题

小区里有一户人家，听说是一对恩爱夫妻，近来从来不出门，好长时间没有人见过他们。
他们的房门紧闭，窗帘厚掩，总是传出奇怪的连续的“嚓、嚓”声响。

终于有一天，楼下安装空调，工人从楼顶用绳子吊下来时无意中从窗帘缝往里面望了一眼，所见到的情形把他吓坏了：只见丈夫举着一把匕首，正往躺在床上的妻子胸口一刀一刀地刺去。

接到报案的警察很快就破门而入，进去时他还没有停止行凶，手起刀落，“嚓、嚓”地插进妻子胸膛中。
英勇的警察一个熟练的前扑动作毫不费力地把他按倒在地上，抢过了他手上的凶器。
整理现场时大家都不约而同地愣了一下：妻子虽然已经死了，身上居然一个伤口也没有。

审讯工作无法顺利进行，警察们有理由相信，这个凶手可能患有精神病，于是他们请来了医学专家。

专家跟嫌疑犯进行了一次单独会谈，当然，在保安设施充足的前提之下。
几个小时之后，门开了，专家疲惫而满脸困惑地走了出来。

“专家，结果出来了吗？”警察们迫不及待地问。

专家一屁股坐在地上，精神恍惚。
良久，他开始说话了。

“这是我暂时难以理解的事情。
我没有发现他有丝毫精神病的迹象，甚至他的头脑比大多数人都健康，而且也没有证据表明他在说谎。
”

“据他交代，一个月前，他的妻子死于心脏病突发，他悲痛欲绝。
这时，他无意之中得到了一把匕首，这把匕首有神奇的魔力，只要把它刺在人的胸口里，时间就会开始倒退。
”

一个警察插口说：“那他的妻子就能起死回生了？”

专家点了点头：“理论上来说，应当是这样的。
”

“但是他妻子还是死的，这纯粹是瞎编！”警察们七嘴八舌地说。

专家摇了摇头：“为了见证这个奇迹，他当时用摄像机进行了录像。
”说着，他打开了录像机，屏幕上，犯罪嫌疑人正拿着匕首，往妻子的胸膛奋力刺去。
“请看这个逐格慢放的画面----在匕首刺进胸膛之后，时间开始倒流，这样匕首就没有刺进胸膛，因此时间又前进了，他的妻子还是死的。
于是，他又把匕首刺了进去，时间又倒流了，匕首又没刺进去.
.
.
.
.
.
如此反复进行着，一直到我们发现为止。
”

警察们都目瞪口呆，他们脑子里也开始混乱了。

Introduce:There is a family in the village, hearing is husband and wife of a pair of conjugal love, do not go out of late, had seen them very for long without the person.
Their door lock, curtain thick cover, it is strange to always come out successive " Ca, Ca " noise.
Eventually one day, install air conditioning downstairs, the worker is seamed from the curtain inadvertently from condole of cord of building be of use comes down toward inside looked, sees case psyched out him: See the husband is lifting a dagger only, toward the wife wind that lies on the bed thorn of one knife ground goes to one knife.
Receive the police that report a case to the security authorities very fast with respect to break into, when going in, he has not stopped do violence, the knife since the hand falls, "Ca, Ca " the ground is inserted into wife chest in.
Gallant police of an adroitness before attack ground of behavioral without striking a blowing presses him, had grabbed the lethal weapon on his hand.
The everybody when arranging the spot happens to coincide the ground was stupefied: Although the wife had died, on the body unexpectedly a cut also is done not have.
Trial work cannot go on wheels, polices have reason to believe, this murderer may contract invigorative disease, then they brought medical expert.
The expert had alone talk with the suspect, of course, it is under the premise with security personnel enough establishment.
After a few hours, the door opened, the expert is tired out and went bemusedly all over the face.
"Expert, did the result come out? " ground of too impatient to wait asks polices.
One buttock takes the expert on the ground, absentminded.
A long time, he began to talk.
"This is the business that I understand hard temporarily.
I did not discover he has the sign of a bit mental disease, even his brains is more healthy than most person, and also show without evidence he is lying.
" " explain according to him, before a month, his wife is broken out at heart disease to death, he is heartstricken.
At this moment, he innocently in got a dagger, this dagger has magical magic power, want to prick it in the person's wind only, time can begin retrogression.
" socket of a police says: "His wife can bring the dying back to life? " the expert nods: "Theoretic for, ought to be such.
" " but his wife is dead still, this is to be made up foolishly purely! " gabble ground says polices.
The expert shakes his head: "To witness this miracle, he undertook kinescope with camera at that time.
" saying, he opened videocorder, on screen, guilty suspect is taking dagger, toward the chest do all one can of the wife thorn goes.
"See this picture that chases case to be put slow please----After dagger lunge chest, time begins to flow backwards, such dagger do not have lunge chest, because this time advanced again, his wife is dead still.
Then, he pricked dagger again go in, time flowed backwards again, dagger does not have lunge again.
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