The logical positivists would have considered string theory as a speculative metaphysics. The instrumentalist aspect of logical positivism does not correspond with the opinions of string theorists. From the point of view of Popper’s falsifiability,  we clearly distinguish between … Read More
In quantum field theory, the main obstacle is the occurrence of the untreatable infinities in the interactions of the particles due to the possibility of arbitrary distances between the point particles. Strings, as extended objects, provide a better framework, which … Read More
In the interpretation of canonical quantum gravity (CQG), gravity appears as a geometric pseudoforce, is reduced to spacetime geometry and becomes a simple effect of spacetime curvature.  (Maudlin). Lehmkuhl argues that canonical formalism does not confirm this interpretation. General … Read More
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Heuristics of quantum gravity For the attempt to create a gravitational quantum theory, there are several research programs, some of which became obsolete over time due to the higher heuristic power of other programs. J. Butterfield thus distinguishes three major … Read More
Recent decades indicate “a blurring of distinction between physical science and mathematical abstraction … [reflecting] a growing tendency to accept, and in some cases ignore, serious testability problems.”  Oldershaw lists dozens of major non-testing issues in the pre-instrumentalist era. … Read More
Over time, the general theory of relativity has accumulated several anomalies and discrepancies, indicating the need for a better theory about gravity or other approaches: Stars in galaxies have a distribution of increasing speeds from the center to the periphery, … Read More
The current cosmological models are built based on general relativity. The solutions of the specific equations, Friedmann-Lemaître-Robertson-Walker,  allow to model the evolution of the universe starting from the Big Bang. Some of the parameters of the universe have been … Read More