to describe. There is no effective difference between a universal perspective in which all detail is blended into equilibrium and a vacuum in which there is no information. The absolute is either everything, or nothing. Yes, observation almost always has the indirect character - material particles are observed by means of electromagnetic radiation or other particles. Yes, observation is always delayed because of restriction in speed of signal. Yes, processing of the received information has sufficiently subjective character. However, all it is not an obstacle to understanding of the nature, in particular, to the solution of a problem of time. It is not a problem, if it is recognised that the process of investigation produces another subjective reality and is never objective reality itself. The conclusions reached depend upon the data that is input,which is limited to what can be detected and how accurately, the assumptions about that data and what it represents, how it is processed which may be a mental process or a mathematical analysis and the model or framework into which solution is fitted. t,continuous regular change in one direction only linked to observed change in 3D space.This may be split into te, measured with external timing device and ti, measured by internal body clock, set by environmental light levels stimulating the pituitary gland. These muddled concepts are then variously applied within science and everyday life.Subjective time is used to give order to experience, but relativity shows that that order of events is subjective. A different observer