31. It is hard to explain this physical theory in simpler terms than the article uses. 32. Any new physical theory is supposed to reduce to successful old theories in some approximation. 33. Now this theory is well known as the physical theory of diffraction ( PTD ). 34. Tentative physical theories that describe this time scale exist; see for instance loop quantum gravity. 35. However, there is no biological or physical theory which relates effects to the log of concentration. 36. In standard physical theories , no causal contact ". 37. Certainly, he says, no existing mathematics or physical theory explains the creation or behavior of oscillons. 38. The first derives directly from current physical theory . 39. This is a mathematical relation that exists in certain physical theories between the bosons and fermions. 40. Conventional physical theories do not model such counterfactuals.
