Steve jobs (who stole it from Picasso, who took it from ?) said "Picasso had a saying -- 'good artists copy; great artists steal' -- and we have always been shameless about stealing great ideas."
This was later "clarified" by Bud Tribble: "If you take something and make it your own ... it's your design and that is the dividing line between copying and stealing."
My history teacher in high school had a simple challenge to get an A for the entire year, skipping all tests and quizzes, and free pass to sleep during class: "Give me a 100% unique idea"
Obviously everyone tried and everyone failed. There are no unique ideas, only innovations upon existing and past work of others.
So I find it odd anyone would downvote you for the truth!