You seem to be misunderstanding the implication of anti-inductivity and/or the point of index funds. Anti-inductivity only holds that strategies that return be

You seem to be misunderstanding the implication of anti-inductivity and/or the point of index funds. Anti-inductivity only holds that strategies that return better than average can't work when applied broadly. There is nothing that implies that a broadly-applied strategy can't give you the market average. Index funds are supposed to give you the average return, that's their objective. There is no reason to believe they won't continue to be successful in doing that (if everybody just invested in index funds, everybody would make the average return...)