Beware friend requests from unknown hotties who have lots of friends in common with you.

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These broad categories help us understand the what can only be described as the lowest-common denominator of information, what lots of people in a general audience may have in common.

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There is resentment against the domination of trade by the incomers, a common complaint in parts of Indonesia that have received lots of migrants.

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But the other thing that they have in common is that they have very large economies, with lots of technology and very productive workforces.

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