What TGD is and what it is not
People, in particular those in academy, tend to see TGD from their perspective often defined by a heavy specialization to a rather narrow discipline. This is of course understandable but often leads to rather comic mis-understandings and considerable intellectual violence and my heart is crying when I see how brilliant ideas are bleeding in the heavy grasp of big academic hands. The following is a humble attempt to express concisely what TGD is not and also what new TGD can give to physics - just to avoid more violence.
- TGD is not just General Relativity made concrete by using imbeddings: the 4-surface property is absolutely essential for unifying standard model physics with gravitation. The many-sheeted space-time of TGD gives rise only at macroscopic limit to GRT space-time as a slightly curved Minkowski space. TGD is not a Kaluza-Klein theory although color gauge potentials are analogous to gauge potentials in these theories. TGD is not a particular string model although string world sheets emerge in TGD very naturally as loci for spinor modes: their 2-dimensionality makes among other things possible quantum deformation of quantization known to be physically realized in condensed matter, and conjectured in TGD framework to be crucial for understanding the notion of finite measurement resolution. TGD space-time is 4-D and its dimension is due to completely unique conformal properties of 3-D light-like surfaces implying enormous extension of the ordinary conformal symmetries. TGD is not obtained by performing Poincare gauging of space-time to introduce gravitation.
- In TGD framework the counterparts of also ordinary gauge symmetries are assigned to super-symplectic algebra, which is a generalization of Kac-Moody algebras rather than gauge algebra and suffers a fractal hierarchy of symmetry defining hierarchy of criticalities. TGD is not one more quantum field theory like structure based on path integral formalism: path integral is replaced with functional integral over 3-surfaces, and the notion of classical space-time becomes exact part of the theory. Quantum theory becomes formally a purely classical theory of WCW spinor fields: only state function reduction is something genuinely quantal.
- TGD is in some sense extremely conservative geometrization of entire quantum physics: no additional structures such as torsion and gauge fields as independent dynamical degrees of freedom are introduced: Kähler geometry and associated spinor structure are enough. Twistor space emerges as a technical tool and its Kähler structure is possible only for H=M4× CP2. What is genuinely new is the infinite-dimensional character of the Kähler geometry making it highly unique, and its generalization to p-adic number fields to describe correlates of cognition. Also the hierarchies of Planck constants heff=n× h and p-adic length scales and Zero Energy Ontology represent something genuinely new.