Dr. Markus Siedenberg is –according to his publisher Prof. Dr. Martin Woesler (European University Press, Berlin, London, Paris) — besides being a brilliant pianist excelling internationally and a university graduate of philosophy, musicology, history and literary studies an intellectual genius: in volume 1 (“Die Fundamentaltheorien”, 2017, ISBN 978-3-86515-253-4) of his peer-reviewed six-volumes Collected Works, Markus Siedenberg not only falsified Einstein’s Special and General Relativity Theory (this is no carnival joke and it will presumably have severe consequences within the scientific community in the future) by finding an overlooked severe logical flaw in those theories (formal logic, independent from empirical data, violation of the principle of non-contradiction (PNC) (see pp. 8-17), but also answered the Leibniz question (Why does the universe exist at all ? Ultimate Why) in physics/cosmology using Leibniz’ own mathematical method (“de more geometrico”) (see pp. 18ff.). Concerning the falsification of Einstein’s relativity and physically curved space, Siedenberg is building upon — among others — physics Nobel Prize Winner Steve Weinberg’s critical view on Einstein’s relatity (“Gravitation and Cosmology”, 1972, p. 147, re-affirmed by Weinberg in Ben-Menahem, Yamina, “Conventionalism: From Poincaré to Quine”, 2006, p. 94, fn. 26). Dr. Siedenberg explains: “Prof. Dr. Hubertus Busche (University of Hagen) has shown in his brilliant essay ‘Geist bei Aristoteles’ that the exclusion criterion of immateriality through the ages was the so-called ‘kinematic criterion’ (Aristotle, Immanuel Kant and many others): something which moves and/or is located within space cannot be immaterial. I found out that even modern physics — without explicity reflecting upon this — has been applying this criterion: e.g., the electron possesses no measurable extension, the photon possesses no mass, the neutron possesses no electrical charge. But all those entities are real, material, physical entities in our cosmos. — So, Einsteinian space is defined as merely relational by Einstein explicitly, and this is totally necessary for his theory which was a critique of the wrong Lorentz ether theory (LET). Space — according to Einstein, and this is completely plausible —  just means the metrical relations of entities contained in it. But, implicitly, Einstein materialises space: the contraction of space — whatever the details of this process are — leads to an absolute age difference of the two twins in the twin paradox. This age gap (depending on the spacecraft’s speed: trillions of years etc.) is an observer-independent result (!!) of the flight of the spacecraft with near the velocity of light. But because of this claimed contraction, space is automatically materialised implicitly. So, this violation of the principle of non-contradiction is the root of all the bizarre claims of Einstein’s theories, that your own grandfather is getting younger than you etc. It does not matter, if Einstein’s ‘space’ is explicitly said to have a mass or an extension (resp. consisting of particles which have an extension) or any other quality: if one claims it is contracting, the criterion of the exclusion of immateriality is automatically fulfilled (!!). —– The falsification of Einstein’s relativity theory then proved to enable me to solve the even bigger puzzle why the universe exists at all. As Leibniz asked: Why does something exist rather than nothing ? I could solve this physical question with a purely mathematical approach. I had to use Georg Cantor’s concept of the cardinality of the infinity. The perennial state of the universe with its infinite quantity of matter (any assumption of a finite quantity of entities leads to a logical problem) is the exact in the middle between  two physical limits (the lower is the vacuum), but the upper physical limit (a higher cardinality of infinity) has never been debated in cosmology, only construed/approached to in mathematics. It’s jus as Sir Arthur Conan Doyle’s famous detective Sherlock Holmes said: ‘It is an old maxim ofmine thatwhen you have excluded the impossible, whatever remains, however improbable, must be the truth.’ (The Adventure of the Beryl Coronet)”       27th September 1972: Markus Siedenberg is born in Mülheim an der Ruhr (Germany), his father was a mathematician and physicist and former student of former piano professor Doris Konrad (Duisburg, Germany). 1986-1988: Piano lessons with Vladimir Horowitz (New York). April 1987: Debut in Israel with Beethoven‘s 3rd Piano Concerto, since then numerous concerts worldwide. Most recent First Prizes (piano professionals): —–Quebec International Music Competition 2020 (Canada; Gold Medal)—–Grand Prize Virtuoso International Music Competition Salzburg 2020 (Austria, Gold Medal)—–Music and Stars Awards 2020 (Spain; 2 Gold Medals)—–Canadian International Music Competition 2020/2021 (Platinum Medal; this competition was the only competition which Dr. Siedenberg        participated in where platinum was the highest attainable medal metal)—–Winner of the Golden Key of Vienna Piano Festival Vienna 2021 (Austria)—–Brilliant Talent Discovery Awards International Music Competition 2021 Singapore (Gold Medal)—–International IMKA Competition for Music & Dance Sarajevo (Bosnia and Herzegovina, First Prize).1993-2000: Piano studies (Folkwang Academy of the Arts, Germany). PhD in musicology with a monograph on Beethoven‘s legendary last piano sonata Opus 111 (“Beethovens Testament”), European University Press, Berlin, London, Paris. [www.amazon.de/Beethovens-Vermächtnis-Dokumentationen-Notentexts-Siedenbergs/dp/3865152546/ref=sr_1_2?__mk_de_DE=ÅMÅŽÕÑ&dchild=1&keywords=markus+siedenberg+beethoven&qid=1619896154&sr=8-2] Click button „Mehr lesen“ for Zurich University musicologist Prof. Dr. Hans-Joachim Hinrichsen‘s evaluation of the book as an international scientific top achievement. Prof. Dr. Hinrichsen is the author of a standard monograph on the Beethoven piano sonatas published in the Bärenreiter Press [www.baerenreiter.com/im-fokus/beethoven/klaviermusik/hans-joachim-hinrichsen-beethovens-klaviersonaten/]          Dr. Siedenberg is now writing 3 PhD theses simultaneously at the University of Hagen (Germany) because — among other reasons — he has already published fundamental theories in the respective fields (see Siedenberg, vol. 1): 1.) Philosophy (supervisor: Prof. Dr. Thomas Sören Hoffmann. The thesis contains — among others — the falsification of Einstein’s theories)2.) Literary Studies (supervisor: Prof. Dr. Uwe Steiner; thesis on the acoustical aspect of Goethe’s ballads)3.) History (supervisor: Prof. Dr. Jürgen Günther Nagel; thesis on the colonial history of the Dutch East Indies).