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I haven't looked into it at all. But I have seen it around. I'm dead serious that I have no idea what it is. Instead of looking it up I want to hear from stackers.

My probably wrong impression is that it means solid and stable, as opinions go.

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Like grounded in an idea. Unshakeable?

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I got nothing else. I have exhausted my ideas. Let's leave it to the experts.

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We better leave it to the scientists.

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