The Quandary Of English Punctuation

There isn't a writer alive who has not had a manuscript rejected simply over punctuation usage.   For example, I know of editors who will count up to a particular number of supposedly mistakes they find and reject the entire manuscript after encountering a certain amount of what they consider to be errors.  This is regardless of how well the manuscript is written.  In the +20 years I have been writing technical and business documentation, it never ceases to amaze me how often this occurs.

Take for example the use of quotation marks.  If for example, you have a sentence ending such as -- the Titanic was considered to be '"unsinkable" -- where is the period placed in ending the sentence?  Between the word "unsinkable" and the final quotation marks, or after the final quotation marks?  The correct answer -- either, but it depends on what school you have attended and what style guide you may be using. Regardless that it is probably the Chicago Style of English you're adhering to, I have seen various style guides as well as editors contradict each other in usage. (In formal English, the period should be placed AFTER the quotation marks. Why it is now more than likely placed between the word and the quotation marks, because printers of newspapers wanted to used smaller sized periods in order to save space.)