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 opinion recieved to the editor of national aeronautics states that manned flights are expensive and dangerous and unmanned are a great deal and hence there must be more investment in ummanned space flight. The opinion of not risking lives of men and women when the same quality of work can be derived seems sound enough. However, the opinion is based on the recent success of unmanned flight which may not be considerate.
The most important thing to keep in mind is that just because recently it did a great job it is not all perfectly fit.There should be detailed study and observations to be dine before investing and producing unmanned flights. The first one being what are the number of times a single space flight be used? What are chances of it failing? What would be damages caused and what would that be? Also, to highlight the letter states a great deal of useful information 'can be', it does not assure that it does gather all the information. So emphasis must be given whether it is definitely giving useful information. An unmanned ship will however be controlled by a man. It will work on the instructions given by the person operating it.
Scientists and analyst will have to feed in the input to collect useful information and whether it will be collected or not, cross chech whether it has collected right or wrong.The possibilty of missing out by a person could be less. Also nothing more can be expected from a unmanned machine unlike with human who can think about things by themselves. It shall collect only that much as instructed.
In order to conclude, before investing resources a proper study and test should be done and if it works as expected only then it should go for production of unmanned flights.
Comments
e-rater score report
Attribute Value Ideal
Final score: 3.0 out of 6
Category: Satisfactory Excellent
No. of Grammatical Errors: 7 2
No. of Spelling Errors: 5 2
No. of Sentences: 15 15
No. of Words: 305 350
No. of Characters: 1405 1500
No. of Different Words: 164 200
Fourth Root of Number of Words: 4.179 4.7
Average Word Length: 4.607 4.6
Word Length SD: 2.5 2.4
No. of Words greater than 5 chars: 97 100
No. of Words greater than 6 chars: 68 80
No. of Words greater than 7 chars: 43 40
No. of Words greater than 8 chars: 28 20
Use of Passive Voice (%): 0 0
Avg. Sentence Length: 20.333 21.0
Sentence Length SD: 11.318 7.5
Use of Discourse Markers (%): 0.533 0.12
Sentence-Text Coherence: 0.296 0.35
Sentence-Para Coherence: 0.498 0.50
Sentence-Sentence Coherence: 0.053 0.07
Number of Paragraphs: 4 5
Grammar and spelling errors:
Line 3, column 119, Rule ID: SENTENCE_WHITESPACE
Message: Add a space between sentences
Suggestion: There
...a great job it is not all perfectly fit.There should be detailed study and observatio...
^^^^^
Line 3, column 414, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...at would that be? Also, to highlight the letter states a great deal of useful inf...
^^
Line 5, column 178, Rule ID: SENTENCE_WHITESPACE
Message: Add a space between sentences
Suggestion: The
...whether it has collected right or wrong.The possibilty of missing out by a person c...
^^^
Line 5, column 235, Rule ID: SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA[1]
Message: Did you forget a comma after a conjunctive/linking adverb?
Suggestion: Also,
... missing out by a person could be less. Also nothing more can be expected from a unm...
^^^^
Line 5, column 274, Rule ID: EN_A_VS_AN
Message: Use 'an' instead of 'a' if the following word starts with a vowel sound, e.g. 'an article', 'an hour'
Suggestion: an
... Also nothing more can be expected from a unmanned machine unlike with human who ...
^
Transition Words or Phrases used:
also, first, hence, however, if, may, so, then
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 24.0 19.6327345309 122% => OK
Auxiliary verbs: 18.0 12.9520958084 139% => OK
Conjunction : 13.0 11.1786427146 116% => OK
Relative clauses : 8.0 13.6137724551 59% => More relative clauses wanted.
Pronoun: 19.0 28.8173652695 66% => OK
Preposition: 33.0 55.5748502994 59% => More preposition wanted.
Nominalization: 6.0 16.3942115768 37% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1441.0 2260.96107784 64% => OK
No of words: 303.0 441.139720559 69% => More content wanted.
Chars per words: 4.75577557756 5.12650576532 93% => OK
Fourth root words length: 4.17215713816 4.56307096286 91% => OK
Word Length SD: 2.58354927931 2.78398813304 93% => OK
Unique words: 167.0 204.123752495 82% => More unique words wanted.
Unique words percentage: 0.551155115512 0.468620217663 118% => OK
syllable_count: 448.2 705.55239521 64% => OK
avg_syllables_per_word: 1.5 1.59920159681 94% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 3.0 4.96107784431 60% => OK
Article: 7.0 8.76447105788 80% => OK
Subordination: 1.0 2.70958083832 37% => OK
Conjunction: 0.0 1.67365269461 0% => OK
Preposition: 3.0 4.22255489022 71% => OK
Performance on sentences:
How many sentences: 15.0 19.7664670659 76% => Need more sentences. Double check the format of sentences, make sure there is a space between two sentences, or have enough periods. And also check the lengths of sentences, maybe they are too long.
Sentence length: 20.0 22.8473053892 88% => OK
Sentence length SD: 65.300127616 57.8364921388 113% => OK
Chars per sentence: 96.0666666667 119.503703932 80% => OK
Words per sentence: 20.2 23.324526521 87% => OK
Discourse Markers: 3.06666666667 5.70786347227 54% => More transition words/phrases wanted.
Paragraphs: 4.0 5.15768463074 78% => More paragraphs wanted.
Language errors: 5.0 5.25449101796 95% => OK
Sentences with positive sentiment : 8.0 8.20758483034 97% => OK
Sentences with negative sentiment : 2.0 6.88822355289 29% => More negative sentences wanted.
Sentences with neutral sentiment: 5.0 4.67664670659 107% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.283023559289 0.218282227539 130% => OK
Sentence topic coherence: 0.0931620975658 0.0743258471296 125% => OK
Sentence topic coherence SD: 0.0697935703328 0.0701772020484 99% => OK
Paragraph topic coherence: 0.156972031427 0.128457276422 122% => OK
Paragraph topic coherence SD: 0.091478711314 0.0628817314937 145% => OK
Essay readability:
automated_readability_index: 11.1 14.3799401198 77% => Automated_readability_index is low.
flesch_reading_ease: 59.64 48.3550499002 123% => OK
smog_index: 3.1 7.1628742515 43% => Smog_index is low.
flesch_kincaid_grade: 9.9 12.197005988 81% => OK
coleman_liau_index: 10.33 12.5979740519 82% => OK
dale_chall_readability_score: 7.76 8.32208582834 93% => OK
difficult_words: 60.0 98.500998004 61% => More difficult words wanted.
linsear_write_formula: 13.0 12.3882235529 105% => OK
gunning_fog: 10.0 11.1389221557 90% => OK
text_standard: 10.0 11.9071856287 84% => OK
What are above readability scores?
---------------------
Rates: 54.17 out of 100
Scores by essay e-grader: 3.25 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.