Implications of a search for intergalactic civilizations on prior estimates of human survival and travel speed

Autor:	Olson, S. Jay, Ord, Toby
Rok vydání:	2021
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology Physics - Physics and Society
Druh dokumentu:	Working Paper
Popis:	We present a model where some proportion of extraterrestrial civilizations expand uniformly over time to reach a cosmological scale. We then ask what humanity could infer if a sky survey were to find zero, one, or more such civilizations. We show how the results of this survey, in combination with an approach to anthropics called the Self Indication Assumption (SIA), would shift any prior estimates of two quantities: 1) The chance that a technological civilization like ours survives to embark on such expansion, and 2) the maximum feasible speed at which it could expand. The SIA gives pessimistic estimates for both, but survey results (even null results) can reverse some of the effect. The SIA-induced shift in expectations is strong enough to be regarded as a falsifiable technological prediction, and a test of the SIA in cosmological reasoning. Comment: 8 pages, 1 figure. For v2: New section added (section V), discussing human existential risk. Minor changes to text to emphasize falsifiable, near-term technological predictions. References added
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2106.13348 Zobrazit plný text záznamu View this record from Arxiv