Here are two examples from
Manhattan GMAT Sentence correction book, taken from chapter 10- Odds and Ends,
I do understand the first sentence is clearly wrong because main verb is missing, however what i couldn't understand is why in the right example ",was famously uttered by Archimedes," is in comma, making it non essential whereas it has the main verb inside "was".
As per the book, below is the explanation.
Whenever you see an and after a comma, check
for two possibilities: (1) a list (apples, grapes, AND pears), or (2) two main clauses (/ like apples, AND
she likes grapes). The GMAT will occasionally create a mixed-up sentence by linking a main clause to a
fragment with and after a comma.
Wrong: The term "Eureka," meaning "I have found it" in ancient Greek and famously
uttered by Archimedes, AND ever since then, scientists have
exclaimed the same word upon making important discoveries.
The capitalized and in the middle of the sentence links a fragment (The term “Eureka, ” followed by two
modifiers) to a main clause {ever since then, scientists have exclaimed the same term...). One way to fix the
sentence is to make the fragment into a main clause as well:
Right: The term "Eureka," meaning "I have found it" in ancient Greek,
WAS
famously uttered by Archimedes, AND ever since then, scientists have
exclaimed the same word upon making important discoveries.
Could someone please explain. Thank you