I think these are parameters that are sympathetic to the lithopanspermic scenario, and respectful of the OP. I'd personally like to believe the probability of abiogenesis producing life in a system is closer to say 1 in 10, that the chance of a seeding event is more like 1 in a million, and expect that the emergence of a communicative intelligence much rarer, still most assumptions will make incidences of life independent and widely separate, eti much more so.

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plenty of woo, at the hotel hoagaland...