Conceptual Problems in Cosmology
In this essay a critical review of present conceptual problems in current cosmology is provided from a more philosophical point of view. In essence, a digression on how could philosophy help cosmologists in what is strictly their fundamental endeavor is presented. We start by recalling some examples of enduring confrontations among philosophers and physicists on what could be contributed by the formers to the day-time striving of the second ones. Then, a short review of the standard model Friedmann-Lema^ tre-Robertson-Walter (FLRW) of cosmology is given, since Einsteins days throughout the Hubble discover of the expansion of the universe, the Gamow, Alpher and Herman primordial nucleo-synthesis calculations and prediction of the cosmic microwave background (CMB) radiation; as detected by Penzias and Wilson, to Guth-Linde inationary scenarios and the controversial multiverse and landscape ideas as prospective way outs to most cosmic conceptual conundrums. It seems apparent that cosmology is living a golden age with the advent of observations of high precision. Nonetheless, a critical revisiting of the direction in which it should go on appears also needed, for misconcepts like \quantum backgrounds for cosmological classical settings" and \quantum gravity unication" have not been properly constructed up-to-date. Thus, knowledge-building in cosmology, more than in any other eld, should begin with visions of the reality, then taking technical form whenever concepts and relations inbetween are translated into a mathematical structure. It is mandatory, therefore, that the meaning of such concepts be the same for all cosmologists, and that any relationship among all them be tested both logically as well as mathematically. In other words, the notorius feature of improbability of our universe, as is well-known, assures to cosmologists a priviledged degree of freedom for formulating interpretations and theories. However, at the same time, it demands for their formulations and conclusions to be considered in the light of data taken from astrophysical observations.