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argument47 作业(hand-in-hand)
ARGUMENT 47 - Scientists studying historical weather patterns have discovered that in the mid-sixth century, Earth suddenly became significantly cooler. Although few historical records survive from that time, some accounts found both in Asia and Europe mention a dimming of the sun and extremely cold temperatures. Either a huge volcanic eruption or a large meteorite colliding with Earth could have created a large dust cloud throughout Earth's atmosphere that would have been capable of blocking enough sunlight to lower global temperatures significantly. A large meteorite collision, however, would probably create a sudden bright flash of light, and no extant historical records of the time mention such a flash. Some surviving Asian historical records of the time, however, mention a loud boom that would be consistent with a volcanic eruption. Therefore, the cooling was probably caused by a volcanic eruption.
1:没有明确比较对象
2:光靠局部发生的并不能说明这个问题----以偏概全!那些历史记录是否可靠。
4:太阳变暗,原因可能很多,不只是火山说不好太阳自己还发生了什么变化呢!呵呵
3:暴响就是火上爆发阿??炸弹呢??
in this argument,the author recommends that the volcanic eruption is the key cause which have made earth's weather cooler in the mid-sixth century,in succession,to support his view, the survival records about a dimming of the sun were cited in Asia and Europe.in the process of argueing,there are many flaws that weaken his viewpoint,such as concluding the final ultimateness just according to some fractional things,and even the certainty about his concerned materials.
to begin with, it might be true,just as the arguer claims,the tempreture was surely cooler in the mid-sixth century, but there is no trace here that shows the tempreture is lower thanbefore or afterward,are we to able to say that our present weather become warmer without any compared object according to the author's thinking?, it is blind to say like that.in the following,the author introduce the records about a dimming of sun in Aria and Europe.here,the assurence about which was utterly mentioned,as we all know,in some sense, some wrote-down-documentation's real degree can not be fully believed!for example,ever and again, information or report about UFO was full of our reality,but most of us have not witnessed,naturually,which was doubted about that by the majority.certaily,not all things should be beholded by us until we believe it! most important is that the conclusion merely based on survival records in the Asia and European which is only a small part of the world,is someting the matter!apparently,it is not convincible to conclude the sayings like that the tempreture of earth suddenly became sinificantly cooler according to records found in asia and Europe whether whose facticity was also assured or not.
Next,the author made a analysis about the problem about dimming sun.on the sumption that the volcanic did erupt and the collision between a large meterite and earth happened,if so ,both of which may not be the significant reasons making the cooler result,and even the author have not refered to the certainty about which must have happened.all those have not strenghten the proposition.as we know,we can not deny that some other factor can also make the sun dim such as sandstorm or some problem happened to the sun itself!
further more,the arguer recite that flash of light probably happen with a large meteorite visiting earth,whose record was not extant,in other words,the collision might not happened,in the following, just like the presenter saying: "a loud boom that would be consistent with volcanic eruption",as we all know,a loud boom would likely to happen when the bomb blow.
in sum ,the argument is not persuasive as it stands,to take more convincing,the author should supply reliable material to support his standpoint.the detailed proof shoul be offered,besides,other factor may also be refered,such as some kind of human being behaviour,or even change of nature itself and so on.
[ 本帖最后由 望天 于 2006-1-7 21:37 编辑 ] |
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