THE XVII CONFERENCE ON FAMEMS AND THE III WORKSHOP ON HILBERT’S SIXTH PROBLEM,KRASNOYARSK,SIBERIA,RUSSIA, 2018 «Rashomon effect»: co≍eventum mechanistic approach in forensics Oleg Yu. Vorobyev Institute of mathematics and computer science Siberian Federal University Krasnoyarsk mailto:oleg.yu.vorobyev@gmail.com http://olegvorobyev.academia.edu Rustam Bikmurzin Institute of mathematics and computer science Siberian Federal University Krasnoyarsk mailto:bukmurzin.sfe@gmail.com Alexander Bulavchuk Institute of mathematics and computer science Siberian Federal University Krasnoyarsk mailto:bulavchuk@gmail.com Maxim Odnokonnyi Institute of mathematics and computer science Siberian Federal University Krasnoyarsk mailto:maks147833@mail.ru Abstract: The Rashomon effect occurs when an event is given contradictory interpretations by the individuals involved. The effect is named after Akira Kurosawa’s 1950 film Rashomon, in which a murder is described in four contradictory ways by four witnesses [1]. The term addresses the motives, mechanism and occurrences of the reporting on the circumstance and addresses contested interpretations of events, the existence of disagreements regarding the evidence of events and subjectivity versus objectivity in human perception, memory and reporting. Lurking behind the theory of experience and chance, co≍eventum mechanics [2, 3, 4], and our modern understanding of mind and matter is the simple idea of co≍event. And among scientists, there is growing confidence that focusing on a co≍event is becoming more and more productive than it once was. Here we consider the co≍eventum mechanistic approach with the co≍eventum mechanistic Bayesian theorems [5] to analyze the Rashomon case in forensics. Keywords: Eventology, probability theory, event, probability, eventological distribution, Gibbs distribution, Boltzmann distribution, hyperbolic distribution, multivariate distribution, entropy, relative entropy, matter, life, mind, Kolmogorov’s axiomatics, believability, certainty, believability theory, theory of experience and chance, co≍event, co≍eventum mechanics, co≍eventum mechanistic Bayesian theorem, Rashomon effect, forensics. MSC: 60A05, 60A10, 60A86, 62A01, 62A86, 62H10, 62H11, 62H12, 68T01, 68T27, 81P05, 81P10, 91B08, 91B10, 91B12, 91B14, 91B30, 91B42, 91B80, 93B07, 94D05 “I’m a witness 0 at the trial among other witnesses in crime  ∈ X. My experience that the 0 in crime is guilty with probability  0 = P(♣0⟩) and not guilty with probability 1 ⊗  0 =1 ⊗ P(♣0⟩), is measured by a special measure, «believability» B(⟨0♣), that is defined on the space of observers (witnesses), «bra-space» ⟨Ω♣, and measures the share of my experience among experiences of other observers. While probability P is defined in another space, the «ket-space» ♣Ω⟩ of observations (testimonies), and measures the share of the chance of observation among chances of other observations”. “I’m a testimony 0 at the trial among other testimonies  ∈ S X . My chance that witnesses  ∈ 0 are agree with me with believability (0)= B(⟨0♣) and witnesses  ∈ X ⊗ 0 don’t agree with me with believability 1 ⊗ (0), is measured by probability measure P(♣0⟩), that is defined on the space of testimonies (observations), «ket-space» ♣Ω⟩, and measures the share of my chance among chances of other testimonies. While believability B is defined in another space, the «bra-space» ⟨Ω♣ of observers (witnesses), and measures the share of the experience of observers among experiences of other observers”. See the theory of experience and chance for details in [2, 5, 4]. Lurking behind the theory of experience and chance, co≍eventum mechanics, and our modern understanding of mind and matter is the simple idea of co≍event. And among scientists, there is growing confidence that focusing on a co≍event is becoming more and more productive than it once was. We consider the co≍eventum mechanistic approach to the literal analyze in details the Rashomon effect 1 from the c ○ 2018 O.Yu.Vorobyev This is an open-access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium provided the original work is properly cited. Oleg Vorobyev (ed.), Proc. of the XVII FAMEMS’2018, Krasnoyarsk: SFU, ISBN 978-5-9903358-8-2 1 «Rashomon» is a 1950 Japanese period psychological thriller film directed by Akira Kurosawa. While the film borrows the title from Akutagawa’s short story «Rashomon», it is actually based on Akutagawa’s short story of 1922 «In a Grove», which provides the characters and plot. The film is known for a plot device that involves various characters providing subjective, alternative, self- serving and contradictory versions of the same incident. The «Rashomon effect» is named after the film (see for details in Wikipedia [6]). The «Rashomon effect» occurs when an event is given contradictory interpretations by the individuals involved. The effect is