Manned space flight is costly and dangerous. Moreover, the recent success of a series of unmanned space probes and satellites has demonstrated that a great deal of useful information can be gathered without the costs and risks associated with sending men and women into space. Therefore, we should invest our resources in unmanned space flight
The author gave an opinion about space flight. He explicitly suggested that more and more money and resources should be spent on unmanned missions because these missions have provided relatively better results than manned missions have. However, the author's recommendation stands on three unwarranted assumptions that he took, and without giving some clear basis to them the recommendation will not hold water.
Firstly, the author assumes that only the manned space flight is costly and dangerous but he did not provide any evidences to support his claim. But, it is possible that the manned mision costs even lower than the unmanned flight. For example, if there is no human being present inside the flight there should be a lot of technology embedded with the spaceship to gather information about the targetted outer space automatically. Placing some experienced and skilled people inside the ship could save a copious amount of money and the time to build those special and intricate machinery stated before. So, without the relevent data it is impossible to make sure that the cost only increases with humans inside the flight.
Secondly, the author assumes that the recent success of some missions are representative of all the missions that had been conducted in the history of mankind. Before making any decision, we need to know about the missions that were carried out prior to these recent years. It could be be possible that in those endeavours having people inside the flight made more promising results than not having anyone inside. We have seen man landing on the moon nearly 50 years ago and it was a giant leap in the history of space travel. It is not fair to reach a conclusion without considering these kinds of missions as well where manned flight gave a lot of inspiration and encouragement in aeronautics expedition.
Finally, the author assumes that unmanned space operation may have gathered a great deal of info. However, science doesn't take anything for enough. The main goal of science is to imvestigate and go beyond. And manned mission might bring about a lot of better results than those unmanned flight. Even if there is a risk, there are people who would give their life away to know the truth about space. One day we might have to migrate to a new planet when earth becomes inhabitable for us. Is unmanned mission is going to provide good results on that too? The author should shine some light in this fact too that unmanned missions are as equally concilatory as manned mission to make his recommendation more persuassive.
To conclude, the author gave his opinion on some data and logics that seems very promising but lacks the evidence and foundation to make some claims on which the opinion depends. By providing more background information on the above mentioned assumptions, he can make his opinion more challenging and robust.
Comments
e-rater score report
Attribute Value Ideal
Final score: 3.5 out of 6
Category: Satisfactory Excellent
No. of Grammatical Errors: 3 2
No. of Spelling Errors: 11 2
No. of Sentences: 23 15
No. of Words: 481 350
No. of Characters: 2352 1500
No. of Different Words: 245 200
Fourth Root of Number of Words: 4.683 4.7
Average Word Length: 4.89 4.6
Word Length SD: 2.552 2.4
No. of Words greater than 5 chars: 170 100
No. of Words greater than 6 chars: 113 80
No. of Words greater than 7 chars: 70 40
No. of Words greater than 8 chars: 44 20
Use of Passive Voice (%): 0 0
Avg. Sentence Length: 20.913 21.0
Sentence Length SD: 6.99 7.5
Use of Discourse Markers (%): 0.478 0.12
Sentence-Text Coherence: 0.295 0.35
Sentence-Para Coherence: 0.488 0.50
Sentence-Sentence Coherence: 0.118 0.07
Number of Paragraphs: 5 5
Grammar and spelling errors:
Line 1, column 1, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
The author gave an opinion about space f...
^^^^^
Line 1, column 256, Rule ID: POSSESIVE_APOSTROPHE[1]
Message: Possible typo: apostrophe is missing. Did you mean 'authors'' or 'author's'?
Suggestion: authors'; author's
...than manned missions have. However, the authors recommendation stands on three unwarran...
^^^^^^^
Line 3, column 1, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...recommendation will not hold water. Firstly, the author assumes that only th...
^^^^^^^^^^^^^^
Line 5, column 1, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...ases with humans inside the flight. Secondly, the author assumes that the re...
^^^^^^^^^^^^^^
Line 5, column 298, Rule ID: ENGLISH_WORD_REPEAT_RULE
Message: Possible typo: you repeated a word
Suggestion: be
...t prior to these recent years. It could be be possible that in those endeavours havin...
^^^^^
Line 7, column 1, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...ragement in aeronautics expedition. Finally, the author assumes that unmanne...
^^^^^^^^^^^^^^
Line 7, column 130, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: doesn't
... a great deal of info. However, science doesnt take anything for enough. The main goal...
^^^^^^
Line 9, column 1, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...his recommendation more persuassive. To conclude, the author gave his opinion...
^^^^^^^^^^^^^^^
Transition Words or Phrases used:
but, finally, first, firstly, however, if, may, second, secondly, so, well, for example
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 20.0 19.6327345309 102% => OK
Auxiliary verbs: 12.0 12.9520958084 93% => OK
Conjunction : 16.0 11.1786427146 143% => OK
Relative clauses : 17.0 13.6137724551 125% => OK
Pronoun: 39.0 28.8173652695 135% => Less pronouns wanted
Preposition: 61.0 55.5748502994 110% => OK
Nominalization: 13.0 16.3942115768 79% => OK
Performance on vocabulary words:
No of characters: 2403.0 2260.96107784 106% => OK
No of words: 480.0 441.139720559 109% => OK
Chars per words: 5.00625 5.12650576532 98% => OK
Fourth root words length: 4.68069463864 4.56307096286 103% => OK
Word Length SD: 2.59913764411 2.78398813304 93% => OK
Unique words: 242.0 204.123752495 119% => OK
Unique words percentage: 0.504166666667 0.468620217663 108% => OK
syllable_count: 756.9 705.55239521 107% => OK
avg_syllables_per_word: 1.6 1.59920159681 100% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 7.0 4.96107784431 141% => OK
Article: 8.0 8.76447105788 91% => OK
Subordination: 3.0 2.70958083832 111% => OK
Conjunction: 2.0 1.67365269461 119% => OK
Preposition: 4.0 4.22255489022 95% => OK
Performance on sentences:
How many sentences: 23.0 19.7664670659 116% => OK
Sentence length: 20.0 22.8473053892 88% => OK
Sentence length SD: 46.1798080246 57.8364921388 80% => OK
Chars per sentence: 104.47826087 119.503703932 87% => OK
Words per sentence: 20.8695652174 23.324526521 89% => OK
Discourse Markers: 3.78260869565 5.70786347227 66% => OK
Paragraphs: 5.0 5.15768463074 97% => OK
Language errors: 8.0 5.25449101796 152% => OK
Sentences with positive sentiment : 13.0 8.20758483034 158% => OK
Sentences with negative sentiment : 3.0 6.88822355289 44% => More negative sentences wanted.
Sentences with neutral sentiment: 7.0 4.67664670659 150% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.228378793521 0.218282227539 105% => OK
Sentence topic coherence: 0.0696404430605 0.0743258471296 94% => OK
Sentence topic coherence SD: 0.0620807229858 0.0701772020484 88% => OK
Paragraph topic coherence: 0.125040615286 0.128457276422 97% => OK
Paragraph topic coherence SD: 0.0762674552394 0.0628817314937 121% => OK
Essay readability:
automated_readability_index: 12.6 14.3799401198 88% => Automated_readability_index is low.
flesch_reading_ease: 51.18 48.3550499002 106% => OK
smog_index: 8.8 7.1628742515 123% => OK
flesch_kincaid_grade: 11.1 12.197005988 91% => OK
coleman_liau_index: 11.78 12.5979740519 94% => OK
dale_chall_readability_score: 7.62 8.32208582834 92% => OK
difficult_words: 91.0 98.500998004 92% => OK
linsear_write_formula: 11.0 12.3882235529 89% => OK
gunning_fog: 10.0 11.1389221557 90% => OK
text_standard: 12.0 11.9071856287 101% => OK
What are above readability scores?
---------------------
Rates: 66.67 out of 100
Scores by essay e-grader: 4.0 Out of 6
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Note: the e-grader does NOT examine the meaning of words and ideas. VIP users will receive further evaluations by advanced module of e-grader and human graders.