People say we shouldn't worry because we have tenure but two ineffective ratings in a row shifts the burden of proof onto the teacher to prove that he / she is not incompetent. (jonathanpelto.com)
To tackle this, we need to shift the burden of proof on innovation in the legal profession. (curolegal.com)
This is called shifting the burden of proof (even though science doesn't deal in «proof»). (religion.blogs.cnn.com)