Correct the quotation errors in the following sentences:
1. "The man who views the world at fifty the same as he did at twenty," remarked the boxer Muhammad Ali, has wasted thirty years of his life
2. Do you agree with Jerry Seinfeld that: "A bookstore is one of the only pieces of evidence we have that people are still thinking?"
3. H.L. Mencken cynically remarked that, "Nobody ever went broke underestimating the intelligence of the American public.
4. "It has been my experience, said Abraham Lincoln that "folks who have no vices have very few virtues.
5. The American historian Barbara Tuchman wrote about the ineptitude of generals, arguing that: "The power to command frequently causes failure to think".
6. Obesity is on the rise around the world, says Ann Becker. The Harvard anthropologist reports that the "Sudden increase in eating disorders among teenage girls in Fiji may be linked to the arrival of television in the 1990s and to "Western ideals of beauty."
7. Donald Trump offered his advice - "there's the old story about the boxer after the fight who said: 'that wasn't so tough." What was really tough was my father hitting me on the head with a hammer. "
8. Before the Revolutionary War, Patrick Henry made a passionate speech, "is life so dear or peace so sweet, as to be purchased at the price of chains and slavery"? "Forbid it, Almighty God"! I know what what course others may take, but as for me, give me liberty or give me death."!