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> I don't think that your personal experience is of any interest

But you didn't specify what you meant by "useful," hence why I asked the question I did. So under such ambiguity, my assertion is absolutely a counterpoint to what you just said. I will ask again, useful for whom, by what definition?

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Oh! Good point, we may not have the same definition of usefulness.

By useful I mean, to the world. That it affect the world in a good way. Maybe it's not the best technology to do something but replace the best way in an CO2 effective way. Maybe it is not a clean technology but increase overall fairness.

I don't know, but it had to have a good income to the world in a way.

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