During 1960s to 1980s, the Russian submarines had constantly heard the sounds "quackers" when they were patrolling the Atlantic and Arctic Ocean. Strangely, the submarines' sonar did not detect any objects at the time. Several hypotheses are proposed to explain this phenomenon. The lecturer, however, questions all these assumptions.
The first theory suggests that the bizarre sounds were generated by the orca whales during their courtship ritual. The lecturer doubts this point, arguing that orca whales normally appeared on the surface of ocean while submarines stay deep in the ocean. Moreover, the orca whales are not undetectable or untraceable animals. Consequently, it is unlikely that the quackers were engendered by the orca whales.
The second assumption states that huge squid may probably cause the mysterious sounds as they are invertebrates, which are hard to be discovered by the sonar. The lecturer rebuts this view, challenging that the quackers temporarily showed up in two decades; nevertheless, squid have already existed before 1960s and are still present today. Hence, it doesn't make sense that the sounds suddenly appeared and stopped.
The third theory claims that another country's submarines were likely to produce the quackers when they were secretly patrolling the same area. The lecturer contradicts this assertion again, pointing out the flaws of this theory. The quackers moved rather fast whereas the submarines were incapable of changing direction quickly. Furthermore, the noise engine sounds were supposed to be caught but there were nothing similar being detected. Thus, this theory is unreasonable as well.
Grammar and spelling errors:
Line 1, column 1, Rule ID: IN_1990s[1]
Message: The article is probably missing here: 'During the 1960s'.
Suggestion: During the 1960s
During 1960s to 1980s, the Russian submarines had co...
^^^^^^^^^^^^
Line 1, column 172, Rule ID: POSSESIVE_APOSTROPHE[1]
Message: Possible typo: apostrophe is missing. Did you mean 'submarines'' or 'submarine's'?
Suggestion: submarines'; submarine's
...lantic and Arctic Ocean. Strangely, the submarines sonar did not detect any objects at the...
^^^^^^^^^^
Line 3, column 116, Rule ID: ENGLISH_WORD_REPEAT_BEGINNING_RULE
Message: Three successive sentences begin with the same word. Reword the sentence or use a thesaurus to find a synonym.
...a whales during their courtship ritual. The lecturer doubts this point, arguing tha...
^^^
Line 5, column 352, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: doesn't
... and are still present today. Hence, it doesnt make sense that the sounds suddenly app...
^^^^^^
Line 7, column 230, Rule ID: ENGLISH_WORD_REPEAT_BEGINNING_RULE
Message: Three successive sentences begin with the same word. Reword the sentence or use a thesaurus to find a synonym.
... pointing out the flaws of this theory. The quackers moved rather fast whereas the ...
^^^
Transition Words or Phrases used:
but, consequently, first, furthermore, hence, however, may, moreover, nevertheless, second, so, still, third, thus, well, whereas, while
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 18.0 10.4613686534 172% => OK
Auxiliary verbs: 1.0 5.04856512141 20% => OK
Conjunction : 5.0 7.30242825607 68% => OK
Relative clauses : 10.0 12.0772626932 83% => OK
Pronoun: 20.0 22.412803532 89% => OK
Preposition: 20.0 30.3222958057 66% => OK
Nominalization: 3.0 5.01324503311 60% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1415.0 1373.03311258 103% => OK
No of words: 251.0 270.72406181 93% => More content wanted.
Chars per words: 5.6374501992 5.08290768461 111% => OK
Fourth root words length: 3.98032404683 4.04702891845 98% => OK
Word Length SD: 2.83059247751 2.5805825403 110% => OK
Unique words: 156.0 145.348785872 107% => OK
Unique words percentage: 0.621513944223 0.540411800872 115% => OK
syllable_count: 425.7 419.366225166 102% => OK
avg_syllables_per_word: 1.7 1.55342163355 109% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 3.0 3.25607064018 92% => OK
Article: 12.0 8.23620309051 146% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 1.0 2.5761589404 39% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 16.0 13.0662251656 122% => OK
Sentence length: 15.0 21.2450331126 71% => The Avg. Sentence Length is relatively short.
Sentence length SD: 40.6870679701 49.2860985944 83% => OK
Chars per sentence: 88.4375 110.228320801 80% => OK
Words per sentence: 15.6875 21.698381199 72% => OK
Discourse Markers: 8.5 7.06452816374 120% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 5.0 4.19205298013 119% => OK
Sentences with positive sentiment : 3.0 4.33554083885 69% => OK
Sentences with negative sentiment : 6.0 4.45695364238 135% => OK
Sentences with neutral sentiment: 7.0 4.27373068433 164% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.454695823275 0.272083759551 167% => OK
Sentence topic coherence: 0.125909783004 0.0996497079465 126% => OK
Sentence topic coherence SD: 0.0972773240648 0.0662205650399 147% => OK
Paragraph topic coherence: 0.253717994536 0.162205337803 156% => OK
Paragraph topic coherence SD: 0.0491846091467 0.0443174109184 111% => OK
Essay readability:
automated_readability_index: 13.0 13.3589403974 97% => OK
flesch_reading_ease: 47.79 53.8541721854 89% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 10.3 11.0289183223 93% => OK
coleman_liau_index: 15.14 12.2367328918 124% => OK
dale_chall_readability_score: 9.35 8.42419426049 111% => OK
difficult_words: 79.0 63.6247240618 124% => OK
linsear_write_formula: 7.5 10.7273730684 70% => OK
gunning_fog: 8.0 10.498013245 76% => OK
text_standard: 8.0 11.2008830022 71% => OK
What are above readability scores?
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Rates: 90.0 out of 100
Scores by essay e-grader: 27.0 Out of 30
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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.