Challenging the Atheist belief

[Natedeezy]

I just had a thought to try and get a scale of how an atheist views things. So, to an atheist, if intelligence within life, such as evolution or the example about sex feeling good, doesn't prove the existence of a creator or God or higher power or whatever who created it, then I have a question. Say we live in a time after a catastrophic event, during which all knowledge of the past has been wiped out and the human race has restarted. Now, lets say while digging in the Earth, a human finds a perfectly preserved sharpie (bc there's one sitting in front of me). Through the eyes of an atheist, intelligence doesn't prove the existence of a creator. So, does this mean the existence of the sharpie (intelligent design), does not prove the existence of a creator of said sharpie? And that it's equally as believable that the sharpie just randomly came together ?