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Thank you very much for you invaluable help, Bob.
Here is the last part of the same summary.

1) One of the other prominent scientists involved in the promotion of nanotechnology, Richard Smalley, has accused Drexler of ‘scaring our children’ and promulgating a vision of the future based on poor scientific reasoning.
2) As a matter of fact, currently there are no nanotechnological devices capable of self-replication .Yet philosophers, ethicists and many scientists frequently speak as if such objects exist now, or will in the very near future.
3) Other scientist think that the “grey goo” scenario is only a distraction, because people must pay attention on the current practices of science and technology and the need for careful oversight and deliberation that attends to current problem and practices, not imagined future scenarios.

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