  The picture of space-time that Minkowski created in 1907 has been followed by
two important developments in physics not contained in the original picture:
general relativity and quantum mechanics. We will argue that the use of
concepts of those theories to construct space-time implies conceptual
modifications in quantum mechanics. In particular one can construct a viable
picture of quantum mechanics without a reduction process that has outcomes
equivalent to a picture with a reduction process. One therefore has two
theories that are entirely equivalent experimentally but profoundly different
in the description of reality they give. This introduces a fundamental level of
undecidability in physics of a kind that has not been present before. We
discuss some of the implications.
