Except for the extra (unpaired) quotation marks, I have no issue with the way it is presented.
My point was about examples like this one from post 129:
This phenomenon is referred to as the "twin paradox". Blah blah next sentence.
This is logical and accurate, as what is being quoted are the two words (twin paradox), not the two words and a piece of punctuation. Therefore, the words being quoted are inside the quote marks, and the punctuation stays outside the quote marks.
The other way is not logical, and is in many cases inaccurate, because the punctuation is not part of the quote:
This phenomenon is referred to as the "twin paradox." Blah blah next sentence.
There is also the clarity that comes with the specific punctuation marks that end a sentence, the most common one being the period. If a period is the piece of punctuation that ends a given sentence, it should come at the end of the sentence. The very end. As in, last. Question marks and exclamation points fall in this category. Quotation marks do not. They do not signal the completion of a sentence, and they do not trigger a reset, if you will, in a reader's processing of the written information in front of him.