Quotation stumper

[Tomaiuolo, Nicholas (Library)]

Web4Lib and Libref readers,
A reference librarian posted the query below to LIBREF.  What a coincidence
-- the same queries had been asked for several weeks on answers.google.com
the Google requestor offered $50 for the answer to each question. The
questions have now "expired" on Google's Answers.

Dear LibRefers, 

  A patron has asked where the following two (different) quotes originated 

  1) "We learn not from experience, but from experiment." 

  2) "Racism is too serious a charge to require evidence" or "the charge of
racism is too serious to need the
  support of evidence"

  I found a couple that might be appropriate for the first one, but I'm
hitting a brick wall for the second.  Does
  anyone out there recognize them.  Any help will be appreciated.

  
  Plano Public Library System 
  Plano, TX