Does null physics claim that quantum mechanics (QM) and general relativity (GR) are incorrect?
Not at all. In fact, this rumor is a self-contradictory statement. QM and GR cover a lot of theoretical ground and both contain quite a few different premises. They are not binary values that are true or false. What null physics claims is that all of the phenomena described by QM and GR are the product of a single deep geometry. Null geometry is nonlinear and four-dimensional, as opposed to the 10 or more dimensions advocated by string theories. Null physics requires less dimensions because it isn’t built on top of QM or GR; it forms their basis.