aristotle - 10:27 am on Nov 23, 2012 (gmt 0)
Having one page on your site that is flagged NOINDEX is not going to adversely affect rankings of other pages on your site.
How do you know this? Do you have a reference? Has a google employee told you?
There is an old thread about this subject [webmasterworld.com ] which offers good reasons to think that it could have an adverse effect. Unless someone at Google explicitly says that it can't, then I don't see how anyone can rule out the possibility.