Tegmark’s Our Mathematical Universe<\/a><\/p>\nGreene uses less provocative language than Tegmark, but makes up for that by suggesting 5 more multiverses than Tegmark (3 of which depend on string theory for credibility, and 2 that Tegmark probably wouldn’t label as multiverses).<\/p>\n
I thought about making some snide remarks about string theory being less real than the other multiverses. Then I noticed that what Greene calls the ultimate multiverse (all possible universes) implies that string theory universes (or at least computable approximations) are real regardless of whether we live in one.<\/p>\n
Like Tegmark, Greene convinces me that inflation which lasts for infinite time implies infinite space and infinite copies of earth, but fails to convince me that he has a strong reason for assuming infinite time.<\/p>\n
The main text is mostly easy to read. Don’t overlook the more technical notes at the end – the one proposing an experiment that would distinguish the Many Worlds interpretation of quantum mechanics from the Copenhagen interpretation is one of the best parts of the book.<\/p>\n","protected":false},"excerpt":{"rendered":"
Book review: The Hidden Reality: Parallel Universes and the Deep Laws of the Cosmos, by Brian Greene. This book has a lot of overlap with Tegmark’s Our Mathematical Universe Greene uses less provocative language than Tegmark, but makes up for that by suggesting 5 more multiverses than Tegmark (3 of which depend on string theory […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[22,23],"tags":[130],"class_list":["post-1002","post","type-post","status-publish","format-standard","hentry","category-books","category-life_univ_etc","tag-infinity"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p80O1l-ga","_links":{"self":[{"href":"https:\/\/bayesianinvestor.com\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1002","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bayesianinvestor.com\/blog\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bayesianinvestor.com\/blog\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bayesianinvestor.com\/blog\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/bayesianinvestor.com\/blog\/index.php\/wp-json\/wp\/v2\/comments?post=1002"}],"version-history":[{"count":1,"href":"https:\/\/bayesianinvestor.com\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1002\/revisions"}],"predecessor-version":[{"id":1003,"href":"https:\/\/bayesianinvestor.com\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1002\/revisions\/1003"}],"wp:attachment":[{"href":"https:\/\/bayesianinvestor.com\/blog\/index.php\/wp-json\/wp\/v2\/media?parent=1002"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bayesianinvestor.com\/blog\/index.php\/wp-json\/wp\/v2\/categories?post=1002"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bayesianinvestor.com\/blog\/index.php\/wp-json\/wp\/v2\/tags?post=1002"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}