A filtering system for received content, uses a computer, which receives content to be posted, the computer receiving content from a plurality of different users; the computer including a content filtering system, receiving the content from the plurality of different users, and operating to carry out a first autonomous screening of the content to use rules to determine whether the content meets a posting criteria, and categorizing the content as to whether the autonomous screening indicates that the content has met the posting criteria, the computer further receiving input from a human screening process which carries out humans to screen the criteria; and a machine learning system, that uses differences between the autonomous rules and the results of the human screening to learn from the human screening more about which autonomous rules are properly written, which rules are suspect, and also to create new autonomous rules.