The language of science, in spite of numerous efforts of methodologists and researchers, is still not completely precise. Throughout history, many authors have mixed concepts, using them without further thought. They expect that the people reading their work will understand them exactly as they do. I admit that the definitions given by me may not be one hundred percent precise, but I hope that I have discussed them thoroughly enough to avoid further confusion. In fact, all the issues presented in the chapter on mathematical and physical foundations can be further studied on your own. There are many books and online publications, so the exploration of this knowledge should not pose much difficulty. I would also like to pay special attention to the fact that in many cases I have just touched the tip of the iceberg. For instance, the Polish version of Wikipedia discusses "Definition" over several pages with references to several books. On the other hand, some issues are clearly neglected, a good example of which may be "an objective observation".
In this closing chapter, I would like to repeat the most important things in it. Each of the sciences are based on certain foundations. Classical mechanics is based on the principles of Newtonian dynamics, fluid mechanics on the Navier-Stokes equations, electronics on Ohm's, Ampere's, Coulomb's and a few other Laws. Physics of life also has such foundations, namely: