<p>“(b) list your examples and citations which enumerate the many and proper uses of ‘for’ and of ‘of’. Use these to demonstrate that the sentence in question is grammatically incorrect, or at least unprecedented.”</p>
<p>Alrighty.</p>
<p>Dictionary and thesaurus sources offering information through examples on the proper use of prepositions after explanation in specific contexts:
explanation of:</p>
<p> as, the explanation of a passage in Scripture, or of a contract or treaty (Websters Revised Unabridged, 1913 Edition;
[explanation</a> - definition of explanation by the Online Dictionary from Datasegment.com](<a href=“http://onlinedictionary.datasegment.com/word/explanation]explanation”>Dictionary-Definition.com :: Explanation definition))
Commentary: The passage, contract, or treaty is the object of a description or explication here. This is inapplicable to the question in dispute because the scientists had already described the birds arrival; they were attempting to describe the cause of the arrival.</p>
<p> Corresponding definition: The meaning attributed to anything by one who explains if; definition; interpretation; sense. Example: Different explanations [of the Trinity]. (Note that the brackets were included in original entry;
<a href=“http://onlinedictinary.datasegment.com/word/explanation;[/url]”>http://onlinedictinary.datasegment.com/word/explanation;</a> Websters Revised Unabridged, 1913 Edition)
Commentary: This example sentence is offered for the definition of explanation when the word is used to indicate [the] meaning attributed to anything by one who explains it; definition; interpretation; [or] sense. A reason for the Trinitys existence is not being provided here; instead, an interpretation or meaning is being conveyed. This example sentence is inapplicable to the sentence in question because the scientists were not attempting to interpret the birds arrival or provide its meaning as one might do with respect to the Trinity.</p>
<p> Corresponding definition: The act of explaining; making something plain or intelligible. Example: I heard his explanation of the accident. (Princeton WordNet 2.1 (2005); [explanation</a> - definition of explanation by the Online Dictionary from Datasegment.com](<a href=“http://onlinedictionary.datasegment.com/word/explanation]explanation”>Dictionary-Definition.com :: Explanation definition))
Commentary: Without the context provided by the definition that corresponds with this example sentence, (The act of explaining; making something plain or intelligible), the meaning of this sentence if one is unaware of the proper usage of explanation of and explanation for is ambiguous. However, because the definition makes it clear that, in this context, an explication is being indicated, one knows that this example is inapplicable to the sentence in question: the scientists were searching for the cause of the phenomenon (i.e., an explanation for the phenomenon), not for an explication or description of this cause (i.e., an explanation of the cause of the phenomenon) or of the phenomenon itself (i.e., an explanation of the phenomenon).</p>
<p> Entry is definition of reason. an explanation of the cause of some phenomenon [reason</a> - definition of reason by the Online Dictionary from Datasegment.com](<a href=“http://onlinedictionary.datasegment.com/word/reason]reason”>Dictionary-Definition.com :: Reason definition))
Commentary: This example is not applicable to the sentence in question, but is nonetheless illuminating, because the explication of the cause of some phenomenon is being indicated here. One is not searching for the cause of the cause; if he or she were, the phrase would be, an explanation for the cause of some phenomenon. If for were substituted for of the cause of, the meaning would be unchanged (an explanation for some phenomenon).</p>
<p> Entry is definition of gloss. a short or expanded explanation of a word, expression, or foreign phrase in the margin or test of a manuscript, etc. (Collins English Dictionary Complete and Unabridged 6th Edition 2003; [gloss</a> - definition of gloss by the Free Online Dictionary, Thesaurus and Encyclopedia.](<a href=“Gloss]gloss - definition of gloss]gloss by The Free Dictionary”>Gloss - definition of gloss by The Free Dictionary))
Commentary: Here, explanation of is being equated with interpretation, that is, the word or phrase itself is being explained (i.e., an explanation of it).</p>
<p> Entry is definition of gloss. an explanation or definition of an obscure word in a text (Princeton WordNet 3.0 (2008); [gloss</a> - definition of gloss by the Free Online Dictionary, Thesaurus and Encyclopedia.](<a href=“Gloss]gloss - definition of gloss]gloss by The Free Dictionary”>Gloss - definition of gloss by The Free Dictionary))
Commentary: The word, not its reason for existence (i.e., an explanation for it), is obscure. Thus, one would offer an explanation of it.</p>
<p> Entry is definition of explication. a detailed explanation of the meaning of something (Princeton WordNet 3.0 (2008); [explanation</a> - definition of explanation by the Free Online Dictionary, Thesaurus and Encyclopedia.](<a href=“Explanation]explanation - definition of explanation]explanation by The Free Dictionary”>Explanation - definition of explanation by The Free Dictionary))
Commentary: Similarly, an explication of the reason for the existence of the meaning of something (i.e., an explanation for the meaning of something) is not being indicated. Instead, an explication of this meaning (i.e., an explanation of the meaning of something) is being offered.</p>