This is What Game Theory Tells Us About Messaging Aliens
Briefly

"Humans benefit from extraterrestrials making choices while assuming humans are strategically similar to them," Fischer tells Inverse.
According to Fischer and Avrashi, we don't want to reveal too much about ourselves to intelligent aliens until they've decided we think like them.
"Both cooperation and confrontation are driven purely by a computational rationale...smart players don't choose to cooperate because they like being nice or confront because they're annoyed, but simply because it provides higher expected payoffs," says Fischer.
The game is all about predicting what the other person will do and responding accordingly - and winning it requires careful strategic thinking.
Read at Inverse
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