Bingo he is one of the three names that constitutes as Satoshi Nakamoto,I worked with nick numerous times on bitgold that Bitcoin is based on
satoshi is a single person....
but your half right. he did work with others such as hal finney and also got idea's about different concepts from people like nickszabo, wai, etc.. but it was only the single person with the monaka of satoshi that made the white paper and brought all the concepts from different people into one.
just like gavin andressen is now coding bitcoin with others adding their concepts in, there are now over 100 people helping out to make bitcoin. but that does not mean gavin andressen is 100 people