There is no Fermi paradox

Details There is no Fermi paradox There is no Fermi paradox

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icar...62..518f&link_type=abstract

Icarus (ISSN 0019-1035), vol. 62, June 1985, p. 518-520.

Mathematics

Probability

3

Extraterrestrial Intelligence, Paradoxes, Artifacts, Probability Theory, Set Theory

Scientific paper

It is argued that the 'Fermi paradox', the contention that extraterrestrial intelligence (ETI) cannot exist because it has not yet been observed, is a logical fallacy. Where A = ETI exist, B = ETI are here, and C = ETI are observed, the inference: If A, then probably B; If B, then probably C; Not-C; Therefore not-B; Therefore not-A is both syntactically and semantically invalid because 'probably' is a modal truth functional operator outside the scope of the first-order propositional calculus. Furthermore, not-C is not certainly true on the basis of available evidence. The possibility that ETI exist in the solar system but have not yet been observed is discussed.

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