Now why put this question to you: It was in moodle.org that I was told, "Linux is not Unix. Literally. Look up the origin of the name." http://docs.moodle.org/22/en/Talk:Cron_with_Unix_or_Linux and http://docs.moodle.org/23/en/Talk:Cron_with_Unix_or_Linux. I was perplexed.
Now this recent statement by Linus confirms, to my ears at least, that Linux is indeed Unix. "Linux, the design came from a great mind, and that great mind was not mine. I mean, you have to give credit for the design of Linux to [Brian] Kernighan, [Dennis] Ritchie and [Ken] Thompson. There is a reason why I like Unix and why I want to redo it."
Listen to "Aalto Talk with Linus Torvalds"
What do you think?
P.S. Sorry for the embedded video. I wanted just a link which'll take you to YouTube.