doubts from Ron's video on parallelism

[vikram4689]

I have following 2 doubts. please help me resolve them

Exception to TOUCH rule (doesn't following statements contradict eachother)
MGMAT SC 4th ed. (pg-234): short predicate can separate noun & noun-modifier.
Ron's video(http://vimeo.com/11867667 at 1:38hrs): says following sentence is wrong because you cannot separate noun & noun modifier "I know more about Shakespear than my brother does, who has not studies british lecture."

Another doubt from same video at 1:38hrs:
a) I know more about Shakespear than does my brother
b) I know more about Shakespear than knows my brother
Ron says- a) is correct because we can put helping verb before subject but b) is wrong because we cannot put action verb before subject. However, we know that, in above context, "does",acting as helping verb, stands for "knows" OR "does==knows" then why there is difference in usage

[tim]

First, I understand you probably learned the word "doubt" differently in whatever country you learned it, but in the US (and on the GMAT), the word "doubt" means that you think something is wrong or unlikely to be true. Because I have seen you use this term many times on the forums, I would encourage you to keep this in mind for your future writing, especially once you are in the business world. Using the word "doubt" will make you appear very argumentative and uncooperative..

As for your questions, please understand in general that if Ron says something that contradicts what you've seen in a book (even ours), you should accept what he says. Sometimes the GMAT makes subtle changes to their approach to SC, and more recent information from Ron will therefore more likely be accurate than will something you see in an older book. Of course, you can continue to ask such questions on the forum, and we can confirm your uncertainties. Just try not to call them doubts, okay? :)

On the second one, "does" does not replace "knows" if it is being used as a helping verb. Used as a helping verb, it will be shorthand for "does know", with the "know" being omitted because it is understood..