Board Thread:Questions and Answers/@comment-31155663-20170228142325/@comment-67.61.191.49-20191027052335

It is possible that Kayaba was ahead of the technological curb and was able to copy his own fluctlight. Whether or not he is alive, in the full science of the word, depends on your interpretation. His conscious takes part in the alfheim arc when he helps Kirito rescue Asuna.