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Scientists Debate Humanity’s Response to Possible Intelligent Life Beyond Earth
(universalrecord.org)
This is a most excellent place for technology news and articles.
I'm in the 'don't respond if they contact us' camp. I've seen 3 Body Problem and read enough history to know what happens to the lower technological society.
I'd say answer just to see if the Dark Forest is valid. If it is, honestly they're going to find us eventually anyway.
If they are interested in us, I doubt it's to enslave us in any worse way then we already are. If they are interested in our raw materials for some reason they wouldn't be looking by shouting out random introductions and will find us randomly. That's my take anyway.
If you've read Lem's Fiasco, then that's the alternative scenario where "they" are the society lower technologically. It's very well written and tragic.
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(Spoiler alert - the command of "us" loses their minds from arrogance and misunderstanding the motives of "them", and the protagonist sent to the surface realizes what "they" are too late to signal that "they" shouldn't be nuked, the end.)So, Ender's Game