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But along with that growth has come ever more sophisticated and complicated efforts for some sellers to gain advantage over others, notably in reviews and rankings.?It has won?arbitration rulings?against several marketers, book authors and publishers who it accused of abusing the Kindle Direct Publishing program with a variety of tactics. It also has filed numerous lawsuits against people who allegedly offer to write?fake product reviews.

But in a tech space where inspiration, connections and behind-the-scenes support circulates more widely than dollars, geeks who think Amazon could step it up zeroed in on one area of civic life where Amazon is noticeably AWOL — the local marketplace of ideas.

But he said new developments in autonomous driving must be introduced onto the roads in a responsible way because they have to be safe, robust and reliable.

But critics noted he still had the black bow tie, which they said evoked servitude, and the "uncle" honorific, reflecting a time when white Southerners used "aunt" and "uncle" because they didn't want to address black people as "Mr" and "Mrs".

But competitors are pressing in.